what is the ph of the buffer that results when 12.5 g of nah2po4 and 22.0 g na2hoi4 are mixed and diluted with water to 0.5 l?

Answers

Answer 1

The pH of the buffer that results when 12.5 g of [tex]NaH_{2}PO_{4}[/tex] and 22.0 g [tex]Na_{2}HPO_{4}[/tex] are mixed and diluted with water to 0.5 L is 9.36. A buffer is a solution that resists changes in pH as acids or bases are added to it. It is created from a weak acid or base and one of its salts.

To calculate the pH of a buffer, we can use the Henderson-Hasselbalch equation: pH = pKa + log([A-]/[HA]) where: pH is the pH of the buffer pKa is the acid dissociation constant of the weak acid[A-] is the concentration of the conjugate base of the weak acid[HA] is the concentration of the weak acid.

According to the problem, 12.5 g of [tex]NaH_{2}PO_{4}[/tex] and 22.0 g [tex]Na_{2}HPO_{4}[/tex] are mixed and diluted with water to 0.5 L. The molecular weight of  [tex]NaH_{2}PO_{4}[/tex] is 120 g/mol. Therefore, the number of moles of  [tex]NaH_{2}PO_{4}[/tex] is:12.5 g × 1 mol/120 g = 0.104 mol The molecular weight of  [tex]Na_{2}HPO_{4}[/tex] is 142 g/mol.

Therefore, the number of moles of  [tex]Na_{2}HPO_{4}[/tex] is:22.0 g × 1 mol/142 g = 0.155 mol The total concentration of the buffer is the sum of the concentrations of the weak acid and its conjugate base. Therefore, the concentration of  [tex]NaH_{2}PO_{4}[/tex] is:0.104 mol/0.5 L = 0.208 M The concentration of   [tex]Na_{2}HPO_{4}[/tex] is:0.155 mol/0.5 L = 0.31 M The pKa of  [tex]NaH_{2}PO_{4}[/tex] is 7.21.The concentration of the weak acid [HA] is 0.208 M.

The concentration of the conjugate base [A-] is 0.31 M.pH = pKa + log([A-]/[HA])= 7.21 + log(0.31/0.208)= 9.36The pH of the buffer that results when 12.5 g of  [tex]NaH_{2}PO_{4}[/tex] and 22.0 g  [tex]Na_{2}HPO_{4}[/tex] are mixed and diluted with water to 0.5 L is 9.36.

To know more about acids & bases, refer here:

https://brainly.com/question/23687757#

#SPJ11


Related Questions

choose the transition state for the following SN2 reaction CI +NaSH ---> SH + NaCI. a) I B) II C) III D) IV

Answers

The transition state for the following SN2 reaction CI + NaSH ---> SH + NaCI is option III.

Transition state in a chemical reaction can be referred to as a molecular configuration that describes the point of maximum energy in the reaction path during which the bonds that are involved in the chemical reaction are in a state of change.

Transition state theory provides detailed explanations of the reaction rates and reaction mechanisms occurring in the gas phase.

The reaction mechanism in question is a substitution reaction in which the hydroxyl ion attacks the alkyl halide, resulting in the creation of an intermediate complex.

The complex is created in a transition state involving the transfer of a negatively charged ion, which will lead to a new bond forming with the incoming nucleophile.

In conclusion, the transition state for the following SN2 reaction CI + NaSH ---> SH + NaCI is option III.

To know more about transition state refer to-

brainly.com/question/30259181#

#SPJ11

Select the best answer for the question.
16. Which statement gives you enough information to say that the atom is electrically
neutral?
A. The atom has 15 neutrons and 15 electrons.
B. The atom has 19 electrons and 19 neutrons.
C. The atom has 7 protons and 7 electrons.
D. The atom has 4 neutrons and 4 protons.

Answers

When Muhammad died, his followers carried on the new religion. Islam prospered and grew under the Caliph Abu-Bakr and those who followed him. What cities became hubs of Muslim thought and power? How did word of this new religion spread? Did it appeal to people outside the Arabian Peninsula?

Explanation:

The correct answer is C. The statement "The atom has 7 protons and 7 electrons" gives enough information to say that the atom is electrically neutral. This is because the number of positively charged protons in the atom is equal to the number of negatively charged electrons, resulting in a net charge of zero. Option A and B both have an unequal number of electrons and protons, so the atom has a net charge. Option D also has an equal number of neutrons and protons but does not give information about the number of electrons.

What is the minimum mass of Mg(NO₃)₂ that must be added to 1.00 L of a 0.560 M HF solution to begin precipitation of MgF₂(s)? For MgF₂, Ksp = 7.4 × 10⁻⁹, and Ka for HF = 7.2 × 10⁻⁴.

Answers

the minimum mass of Mg(NO₃)₂ required to begin precipitation of MgF₂ is 6.37 × 10⁻³ g/L.

The balanced equation for the precipitation of MgF₂ from Mg(NO₃)₂ and HF is:

Mg(NO₃)₂ + 2HF → MgF₂(s) + 2HNO₃

The concentration of fluoride ions can be found using the equilibrium expression for the dissociation of HF:

HF + H₂O ⇌ H₃O⁺ + F⁻

Ka = [H₃O⁺][F⁻]/[HF]

Since the initial concentration of HF is 0.560 M, the concentration of [H₃O⁺] is negligible compared to [HF] because HF is a weak acid. Therefore, we can simplify the expression to:

Ka = [F⁻][HF]/[HF] = [F⁻]

[F⁻] = Ka = 7.2 × 10⁻⁴ M

Now we need to determine the minimum amount of Mg(NO₃)₂ required to provide enough fluoride ions to reach the saturation point of MgF₂.

Let's assume x moles of Mg(NO₃)₂ is added to 1.00 L of 0.560 M HF solution. This will result in the addition of 2x moles of F⁻ ions to the solution.

The molar solubility of MgF₂ is equal to the square root of Ksp because the stoichiometric coefficients are 1 for both MgF₂ and Mg(NO₃)₂.

Molar solubility of MgF₂ = sqrt(Ksp) = sqrt(7.4 × 10⁻⁹) = 8.6 × 10⁻⁵ M

To reach saturation, the concentration of F⁻ ions must be equal to the molar solubility of MgF₂. Therefore:

[F⁻] = 8.6 × 10⁻⁵ M = 2x moles/L

x = 4.3 × 10⁻⁵ moles/L

The mass of Mg(NO₃)₂ required is then:

mass = moles × molar mass = (4.3 × 10⁻⁵ mol/L) × (148.3 g/mol) = 6.37 × 10⁻³ g/L.

Learn more about concentration here:

https://brainly.com/question/10725862

#SPJ1

the ksp of agcl is 1.61 x 10-10. what is the solubility of agcl in a solution of 3.42 x 10-4 m srcl2?

Answers

The solubility of AgCl in the given solution is 1.26 x 10⁻⁸ M.

The reaction is,

AgCl(s) ⇌ Ag⁺(aq) + Cl⁻(aq)

Ksp = [Ag⁺][Cl⁻] = 1.61 x 10⁻¹⁰

SrCl₂ dissociates as follows:

SrCl₂(s) ⇌ Sr²⁺(aq) + 2Cl⁻(aq)

Since the reaction between AgCl and SrCl₂ does not involve the Sr²⁺ ion, its concentration can be considered constant and omitted from the equilibrium expression.

The solubility of AgCl in a solution of 3.42 x 10⁻⁴ M SrCl₂ is given by the following equation:

Ksp = [Ag⁺][Cl⁻] = x(2x + 3.42 x 10⁻⁴)

where x is the molar solubility of AgCl.

Solving for x,

x = 1.26 x 10⁻⁸ M

To know more about solubility, here

brainly.com/question/28044392

#SPJ4

when the temperature of ice-cold water is increased slightly, does it undergo a net expansion or a net contraction? group of answer choices neither contraction nor expansion expansion a combination of expansion (due to increased molecular motion) and contraction (due to crystal collapse) leads to a net expansion. contraction

Answers

The rate at which the water expands continues to increase until it reaches the freezing temperature of 0°C or 32°F.

When the temperature of ice-cold water is increased slightly, it undergoes a net contraction. In the case of water, the density of water is at a maximum at 4°C or 39°F. This implies that, as the temperature of water decreases, its density will increase until it reaches 4°C. As a result, the water will begin to expand again.

As a result, when the temperature of ice-cold water is increased slightly, it will undergo a net contraction.According to the Density Anomalies of Water experiment, as the temperature of water decreases, its density increases.

Water achieves its maximum density at 4°C or 39°F. When the temperature of water falls below 4°C, the water starts to expand. At this point, the water begins to freeze, causing a further expansion in volume.

To learn more about : temperature

https://brainly.com/question/4735135

#SPJ11

what is the relationship between absorbance and concentration, and how is this illustrated in your spectra of the buffered 2-naphthol solutions? g

Answers

The term absorbance is directly proportional to the concentration (c) of the solution which is used in the experiment of the spectra.

The absorbance is defined as the term which is said to be directly proportional to the length of the light path that is equal to the width of the cuvette. The relationship between concentration and absorbance can be explained by the Beer-Lambert law. This law relates the attenuation of light to the properties of a material. The Beer-Lambert law is defined as the law which states that the concentration of a chemical solution is directly proportional to its absorption of light.

The acid dissociation constants were determined in the spectra will be 2.97 pKa* and 9.47 pKa. The pKa and pKa* values are corresponded well with literature values of 9.45 and 3.0 with a 0.2 and 1.0% difference, respectively. This was determined that 2-naphthol is a weaker acid in the ground state than the excited state due to the value of  pKa > pKa.

To learn more about  absorbance

https://brainly.com/question/14919298

#SPJ4

14. Activities in the human body are represented in the diagram below Heat released from body by blood vessels dilating or by sweating Blood temperature decreases L Signals via blood ୮ Blood temperature increases L Brain Skin Skin Heat conserved by blood vessels constricting or by not sweating (Not drawn to scale) alel Ĵ "Too hot" Signals to skin via nerves "Too cold" Source: Campbell and Reece, Biology, 6th edition (adapted) Which title would be appropriate for the diagram? A) Rate of Excretion Varies in Response to Amount of Water Taken In B) Feedback Mechanisms Help to Maintain Homeostasis C) Respiratory Rate Responds to an Increase in Muscle Activity D) The Nervous System Responds to Changes in Blood Sugar Levels​

Answers

Heat manufacturing is a feature of metabolism. Most of the warmth produced in the body is generated in the liver, brain, heart, and skeletal muscle mass all through exercise.

What is the technique through which warmness is produced in human body?

In our body, cellular respiration leads to formation of water, carbon dioxide and launch of energy. This energy is stored in the shape of ATP. Some structure of this strength is utilised in day by day things to do and the excess is launched in the form of heat.

Which of the following is the method in which heat is misplaced from the body as wind passes over it?

Cooling Your Body

Convection happens when warmness is carried away from your body by means of shifting air. If the surrounding air is cooler than your skin, the air will absorb your heat and rise.

Learn more about human body here;

https://brainly.com/question/2844926

#SPJ9

2. How are the electron arrangements in each pair of elements similar?
b) O and Se
a) Ba and Sr
c) N and As

Answers

Both Ba and Sr belong to the same group of elements in the periodic table Oxygen and selenium both belong to group 16 of the periodic table Nitrogen and arsenic belong to the same periodic table group of elements.

How do the electron arrangements of Ba and Sr contribute to their similar chemical properties?

Ba and Sr both have two valence electrons in their outermost shell and belong to the same group of elements in the periodic table, the alkaline earth metal group.

This similarity in electron arrangement leads to similar chemical properties.

What is the significance of nitrogen and arsenic belonging to the same group in the periodic table?

Nitrogen and arsenic belong to group 15 of the periodic table, also known as the nitrogen group. Both elements have five valence electrons in their outermost shell, and their shared electron arrangement contributes to similar chemical properties such as their ability to form compounds with three other atoms.

To know more about periodic table,visit:

https://brainly.com/question/11155928

#SPJ1

a solution is prepared by adding 0.020 moles of na 2 hpo 4 and 0.010 moles of nah 2 po 4 to 100.0 ml of water. what is the ph of this solution? for h3 po 4 : ka1

Answers

The pH of the solution prepared by adding 0.020 moles of Na₂HPO₄ and 0.010 moles of NaH₂PO₄ to 100.0 ml of water is found to be 7.51.

A solution is prepared by adding 0.020 moles of Na₂HPO₄ and 0.010 moles of NaH₂PO₄ to 100.0 ml of water.

The total H⁺ concentration of the solution will be given as,

H⁺= √(Ka₁C₁)+(Ka₂C₂)

C₁ and C₂ are the concentration of the two acids. The Ka₁ and Ka₂ are the standard values of the solution. Putting all the values in the above mentioned formula we will get the pH of the solution to be 7.51.

To know more about pH of the solution, visit,

https://brainly.com/question/172153

#SPJ4

if i contain 3 moles of gas in a container with a volume of 60 liters and at a tempurature of 400k what is the pressure indise the container

Answers

If I contain 3 moles of gas in a container with a volume of 60 liters and at a temperature of 400 K,The pressure inside the container is approximately 16.42 atm.

Using the Ideal Gas Law, we can calculate the pressure inside the container. The Ideal Gas Law is expressed as PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.

In this case, you have 3 moles of gas (n = 3), a volume of 60 liters (V = 60 L), and a temperature of 400 K (T = 400 K). The gas constant (R) for this equation is 8.314 J/(mol·K), but since we are using liters and atm, we need to use the value 0.0821 L·atm/(mol· K).

Now, we can plug the values into the equation:

P × 60 L = 3 mol × 0.0821 L·atm/(mol·K) × 400 K

To find the pressure (P), we will rearrange the equation and solve for P:

P = (3 mol × 0.0821 L·atm/(mol·K) × 400 K) / 60 L

P ≈ 16.42 atm

So, the pressure inside the container is approximately 16.42 atm.

Know more about  Ideal Gas Law here:

https://brainly.com/question/27870704

#SPJ11      

what do you still think about what determines the Moon's appearance from Earth?

Answers

Answer:

I think that the moon's rotation around the Earth shows us different parts of the moon

Explanation:

Answer:

The biggest clue to why the Moon always looks different when you look up at the sky is that it is constantly moving in relation to Earth and the Sun.

Explanation:

4 (c) Aluminium is produced by electrolysis of a molten mixture of aluminium oxide and cryolite. This is shown in Figure 3.
Name a gas produced at the positive electrode. Gas forms at the positive electrode Aluminium forms at the negative electrode [1 mark]​

Answers

i’m not that smart in chem but i think it’s oxygen (O2)

describe the basis of using carbon monoxide to quantify pulmonary diffusion capacity describe the assumptions made in this method address each of these assumptions in light of differences in diffusivity of carbon monoxide compared to oxygen and differences in solubilities of these two gases. what role does hemoglobin play in this method?

Answers

The pulmonary diffusion capacity of carbon monoxide (DLCO) is used to determine the transfer of gases through the lungs. The amount of carbon monoxide absorbed by hemoglobin in the lungs is measured in this method.

Carbon monoxide has a higher diffusion coefficient than oxygen, and it is 20-30 times more soluble than oxygen. These differences affect the interpretation of DLCO results. Hemoglobin is a molecule that is critical in the transportation of oxygen and carbon monoxide. Hemoglobin is known to bind with carbon monoxide 240 times more readily than oxygen. In this method, hemoglobin plays a critical role. It is assumed that 100 percent of inhaled carbon monoxide is absorbed into the bloodstream and that the hemoglobin-CO complex forms reversible binding without causing an alteration in the blood's oxygenation level.

The DLCO measurement is based on the following assumptions: At sea level, the concentration of carbon monoxide is zero in the blood being analyzed. The solubility of carbon monoxide in blood is 20-30 times greater than that of oxygen, indicating that it is dissolved in the blood more easily. The alveolar-capillary barrier's thickness is consistent throughout the lung's entire surface area. The diffusion capacity is determined solely by the exchange of gases through the alveolar-capillary membrane and the available hemoglobin in the blood.

Learn more about carbon monoxide at  brainly.com/question/22530423

#SPJ11

the following experiment was carried out using a newly synthesized chlorofluorocarbon. exactly 50 ml of the gas effused through a porous barrier in 157 s. the same volume of argon effused in 76 s under the same conditions. which compound is the chlorofluorocarbon?

Answers

The molar mass corresponds to the chlorofluorocarbon CF3Cl (Freon-11), which has a molar mass of 137.37 g/mol. Therefore, the chlorofluorocarbon in the experiment is CF3Cl.

The rate of effusion of a gas through a porous barrier is inversely proportional to the square root of its molar mass. Therefore, we can use the rate of effusion to determine the relative molar mass of the two gases and identify which one is a chlorofluorocarbon.

The rate of effusion can be calculated using Graham's law:

Rate of effusion = Volume of gas / Time taken to effuse

For the chlorofluorocarbon, the rate of effusion is:

Rate of effusion (CFC) = 50 mL / 157 s = 0.3185 mL/s

For argon, the rate of effusion is:

Rate of effusion (Ar) = 50 mL / 76 s = 0.6579 mL/s

Using Graham's law, we can set up the following equation:

Rate of effusion (CFC) / Rate of effusion (Ar) = sqrt(Molar mass (Ar) / Molar mass (CFC))

Solving for the ratio of molar masses:

Molar mass (Ar) / Molar mass (CFC) = (Rate of effusion (Ar) / Rate of effusion (CFC))^2

Molar mass (Ar) / Molar mass (CFC) = (0.6579 mL/s / 0.3185 mL/s)^2

Molar mass (Ar) / Molar mass (CFC) = 4.294

Molar mass (CFC) = Molar mass (Ar) / 4.294

The molar mass of argon is 39.95 g/mol. Therefore, the molar mass of chlorofluorocarbon is:

Molar mass (CFC) = 39.95 g/mol / 4.294 = 9.30 g/mol

To learn more about molar mass

https://brainly.com/question/13152455

#SPJ4

How many grams of O2 are required to react with 15.6 moles of CO2?

Answers

Answer: 499.2g of O2

Explanation:CO2 + O2 ---> CO2 +H20

From the equation, we know 1 mole of oxygen requires 1 mole of CO2 to react completely.

Therefore it is sure that 15.6 mole of CO2 requires 15.6 moles of O2

To convert moles of O2 to grams, we need to use the molar mass of O2

i.e. 32.00g/mol

the mass of O2 required is

15.6 moles *32.00 g/mol = 499.2g

5.0 L of a gas goes from 1.0 atm to 1.3 atm. Calculate the final volume of this gas.

Answers

Answer: The heat capacity of a bomb calorimeter is 500 J°C.

Find the mass, in grams, of 11.2 L H2 at STP

Answers

The mass of 11.2 litres of a certain gas at s.t.p. is 24 g. The gram molecular mass of the gas is 24g×
11.2L
22.4L/mol

=48g/mol
Note: At s.t.p., 1 mole of any gas occupies a volume of 22.4 L.

the major source of indoor air pollution in developing countries is group of answer choices lead based paints on furniture and walls. cigarette smoke. synthetic materials in construction of buildings. indoor cooking with biomass as a fuel. release of radon-222 gas.

Answers

Indoor cooking with biomass fuel is the major source of indoor air pollution in developing countries, causing health risks.

The significant wellspring of indoor air contamination in emerging nations is indoor cooking with biomass as a fuel. Biomass fills, like wood, charcoal, and creature waste, are regularly utilized for cooking and warming in many non-industrial nations. Be that as it may, consuming these powers delivers a scope of poisons very high, including particulate matter, carbon monoxide, and nitrogen oxides, which can have serious wellbeing impacts.

Toxic paints on furnishings and walls, tobacco smoke, manufactured materials in development of structures, and arrival of radon-222 gas are additionally wellsprings of indoor air contamination, yet they are not as predominant in that frame of mind as indoor cooking with biomass fuel. Resolving this issue through clean cooking arrangements and advancing the utilization of cleaner powers can essentially further develop indoor air quality and decrease wellbeing gambles in these districts.

To learn more about biomass, refer:

https://brainly.com/question/28217240

#SPJ4

In a titration, 25mL of 0.20M NaOH neutralize 5mL of HCI, what is the acid molarity?

Answers

The molarity of the HCl sample is 1.0 M.

In a titration, the moles of acid are equal to the moles of base at the equivalence point.

We can use this principle to calculate the molarity of the acid (HCl) from the volume and concentration of the base (NaOH) used in the titration.

First, we need to calculate the number of moles of NaOH used in the titration:

moles of NaOH = M x V = 0.20 M x 0.025 L = 0.005 mol

Since NaOH and HCl react in a 1:1 molar ratio, the number of moles of HCl present in the sample is also 0.005 mol.

Now we can calculate the molarity of HCl using the number of moles and the volume of the HCl sample used in the titration:

molarity of HCl = moles of HCl / volume of HCl sample

molarity of HCl = 0.005 mol / 0.005 L

molarity of HCl = 1.0 M

For more question on molarity click on

https://brainly.com/question/14469428

#SPJ11

what is the final volume of 5.31L of an ideal gas when heated from 200 K to 300 K at constant pressure?

Answers

The final volume of the gas is approximately 7.97 L. This type of process is often represented on a pressure-volume (PV) diagram as a horizontal line, where the pressure is constant and the volume changes.

What is Constant Pressure?

Constant pressure refers to a thermodynamic process where the pressure of the system remains constant throughout the process. This means that if a gas is undergoing a constant pressure process, its pressure will remain the same, but its volume, temperature, and other properties may change. In a constant pressure process, the system can exchange heat with its surroundings, but the pressure remains constant.

We can use Charles's Law to solve this problem, which states that at constant pressure, the volume of an ideal gas is directly proportional to its temperature in Kelvin.

We can set up a proportion:

(V₁/T₁) = (V₂/T₂)

where V₁ is the initial volume (5.31 L), T₁ is the initial temperature (200 K), V₂ is the final volume (what we want to find), and T₂ is the final temperature (300 K).

Solving for V₂:

V₂ = (V₁/T₁) x T₂

V₂ = (5.31 L / 200 K) x 300 K

V₂ = 7.965 L

Learn more about Constant Pressure from the given link

https://brainly.com/question/1480756

#SPJ1

The ph curve ends with a ph of
A. 0-3
B. 4-7
C. 7-10
D. 11-14

Answers

The answer should be A. 0-3

when 7.5 x 10-4 g of koh is dissolved in 1.00 l of 1.0 x 10-10 m cu(no3)2, a precipitate of cu(oh)2 is formed. true or false? (ksp of cu(oh)2 is 2.2 x 10-20)

Answers

The given statement {When 7.5 x 10^-4 g of KOH is dissolved in 1.00 L of 1.0 x 10^-10 M Cu(NO3)2, a precipitate of Cu(OH)2 is formed} is True. This is because the Ksp of Cu(OH)2 (2.2 x 10^-20) is exceeded, leading to the formation of a precipitate. So the answer is true.

When 7.5 x 10-4 g of KOH is dissolved in 1.00 L of 1.0 x 10-10 M Cu(NO3)2, a precipitate of Cu(OH)2 is formed. This statement is true.

The equation is given below:

Cu(NO3)2 + 2KOH → Cu(OH)2 + 2KNO3, the given Ksp value for Cu(OH)2 is 2.2 x 10-20.

Molarity of Cu(NO3)2 is given by:

M = (1.0 x 10-10 mol/L) = moles of solute/L of solution= n/1.0 L1.0 x 10-10 = n/1.0 n = 1.0 x 10-10 mol

Amount of KOH is given by: Molarity of KOH = moles of solute/L of solution M = 7.5 x 10-4 g/(56.11 g/mol)/1.0 L= 1.336 x 10-5 mol/L, the balanced equation shows that the ratio of Cu(NO3)2 to KOH is 1:2.

Thus, moles of KOH = 2 x moles of Cu(NO3)2. Hence moles of Cu(NO3)2 = 1.0 x 10-10 mol/L x 1.0 L = 1.0 x 10-10 mol.

Moles of KOH = 2 x 1.0 x 10-10 mol = 2.0 x 10-10 mol.

Now we have the amount of both Cu(NO3)2 and KOH used in the reaction. The Ksp of Cu(OH)2 is given as 2.2 x 10-20.

The formula of Ksp is;

Ksp = [Cu2+][OH-]2Cu2+ and OH- are produced in a 1:2 molar ratio according to the balanced equation.

Therefore, [Cu2+] = 1.0 x 10-10 mol/L and [OH-] = 2 x 2.0 x 10-10 mol/L = 4.0 x 10-10 mol/L.

The value of Ksp is calculated as follows:

Ksp = [Cu2+][OH-]2= (1.0 x 10-10 mol/L)(4.0 x 10-10 mol/L)2= 1.6 x 10-28 mol3/L3.

This Ksp value is less than the given Ksp of Cu(OH)2 (2.2 x 10-20), which implies that a precipitate of Cu(OH)2 will form, and the statement is true.

For more questions on: KOH

https://brainly.com/question/31213916

#SPJ11  

each of the following is one of the major classes of outdoor pollutants except (mark all that apply) group of answer choices carbon oxides suspended particles nitrogen oxides sulfur oxides smog

Answers

Smog is a result of the interaction between different pollutants, it does not belong to the major classes of outdoor pollutants.


Let me briefly explain each major class of outdoor pollutant:

1. Carbon oxides: This group includes carbon monoxide (CO) and carbon dioxide (CO2). Carbon monoxide is a toxic gas produced by the incomplete combustion of fuels, while carbon dioxide is a greenhouse gas released from various human activities like the burning of fossil fuels.

2. Suspended particles: These are tiny solid or liquid particles suspended in the air, also known as particulate matter (PM). They can be emitted from various sources like construction activities, vehicle emissions, and industrial processes. Suspended particles can cause respiratory issues and other health problems.

3. Nitrogen oxides: This group includes nitrogen dioxide (NO2) and nitric oxide (NO), which are mainly emitted from vehicle exhausts and industrial processes. Nitrogen oxides contribute to the formation of smog, acid rain, and can cause respiratory problems.

4. Sulfur oxides: Sulfur dioxide (SO2) is the primary sulfur oxide, and it is released from burning fossil fuels, especially coal and oil, and from industrial processes. Sulfur oxides contribute to the formation of acid rain and can also cause respiratory problems.

for more questions on Smog :

https://brainly.com/question/2540988

#SPJ11

Why is it important for ocean to have various regions

Answers

Answer:

Explanation:

The ocean is a huge body of salt water that covers about 71 percent of Earth’s surface. The planet has one global ocean, though oceanographers and the countries of the world have traditionally divided it into four distinct regions: the Pacific, Atlantic, Indian, and Arctic oceans. Beginning in the 20th century, some oceanographers labeled the seas around Antarctica the Southern Ocean, and in 2021 National Geographic officially recognized this fifth ocean.

An estimated 97 percent of the world’s water is found in the ocean. Because of this, the ocean has a considerable impact on weather, temperature, and the food supply of humans and other organisms. Despite its size and impact on the lives of every organism on Earth, the ocean remains a mystery. More than 80 percent of the ocean has never been mapped, explored, or even seen by humans. A far greater percentage of the surfaces of the moon and the planet Mars has been mapped and studied than of our own ocean floor.

Although there is much more to learn, oceanographers have already made some amazing discoveries. For example, we know that the ocean contains towering mountain ranges and deep canyons, known as trenches, just like those on land. The peak of the world’s tallest mountain—Mount Everest in the Himalayas, measuring 8.84 kilometers (5.49 miles) high—would not even break the surface of the water if it was placed in the Pacific Ocean’s Mariana Trench or Philippine Trench, two of the deepest parts of the ocean.

would a solution of LiF be electrically condition?​

Answers

A solutions that is highly reactive & consists ions— molecules or atoms that also have received or exchanged electrons—is an electrolyte solution.

Electrically, what charge does an electrolyte solution have?

Since the final cost on I equal the net cost on (ii), the electrolytic mixture is always neutral (iii). Unlike with the superconductor, the sodium chloride conducts the electrical charge by virtue of progression of its (iv). The characteristic that causes a metal to prefer to dissolve in positive charge is defined as (v).

Are electrolytes positively charged?

Substances known as electrolytes show a natural positive or negative static electricity when submerged in water. Several body activities are supported by them, including controlling nuclear reactions or preserving overall proportion of liquids both inside and outside your cells.

To know more about electrons visit:

https://brainly.com/question/28977387

#SPJ1

magnesium sulfate, , is added to 133 ml of m sodium hydroxide, , until precipitate just forms. how many grams of magnesium sulfate were added? assume that the volume of the solution is not changed significantly by the addition of magnesium sulfate.

Answers

In the following chemical reaction, the solution was supplemented with 8.01g of magnesium sulfate.

We must utilize the following chemical formula to determine how magnesium sulfate and sodium hydroxide react to solve this issue:

MgSO4 + 2 NaOH → Mg(OH)2 + Na2SO4

One mole of magnesium sulfate (MgSO4) interacts with two moles of sodium hydroxide (NaOH), resulting in one mole of magnesium hydroxide (Mg(OH)2) and one mole of sodium sulfate, according to the equation (Na2SO4).

We must utilize the solution's concentration and volume to determine how many moles of NaOH are present in the solution:

C = n/V

where n is the number of moles, V is the volume in liters, and C is the concentration in moles per liter.

n(NaOH) = C × V

               = 1 mol/L × 0.133 L  

               = 0.133 mol.

We require half as many moles of MgSO4 as we do of NaOH since their mole ratio is 1:2:

n(MgSO4) = 0.5 × n(NaOH)

                 = 0.5 × 0.133 mol

                 = 0.0665 mol

Using its molar mass, we can finally translate the quantity of MgSO4 from moles to grams:

m(MgSO4) = n(MgSO4) × M(MgSO4)

                  = 0.0665 mol × 120.4 g/mol = 8.01 g

Therefore the solution was supplemented with 8.01g of magnesium sulfate.

To learn more about chemical reactions, refer to:

https://brainly.com/question/11231920

#SPJ4

what is the ph of a solution with a hydronium ion concentration of 0.01 mole per liter? * (1) 1 (2) 2 (3) 10 (4) 14

Answers

the pH of the given solution is 2.

pH is a measure of the acidity or alkalinity of a solution, and is defined as the negative logarithm (base 10) of the concentration of hydrogen ions (H+) in the solution. pH values range from 0 to 14, with a pH of 7 being neutral, a pH below 7 being acidic, and a pH above 7 being alkaline or basic.

A low pH value indicates a high concentration of hydrogen ions, which makes the solution acidic. A high pH value indicates a low concentration of hydrogen ions, which makes the solution basic. The pH scale is commonly used in many fields, including chemistry, biology, environmental science, and medicine, to describe and quantify the acidity or alkalinity of a solution.
The pH of a solution with a hydronium ion concentration of 0.01 mole per liter can be calculated using the formula:

pH = -log[H3O+]

where [H3O+] is the concentration of hydronium ions in moles per liter.

Substituting the given value, we get:

pH = -log(0.01)

Using a calculator, we get:

pH = 2

Therefore, the pH of the given solution is 2.

To know more about pH go through:-

https://brainly.com/question/172153

#SPJ4

A group of students is comparing the graphs of strong acid-strong base and weak acid-strong base titration curves, where the base is the titrant. Which statement inaccurately describes a difference between the two curves?

A. The initial pH for the weak acid-strong base curve is higher than the initial pH for the strong acid-strong base curve.

B. At the equivalence points, the pH of the weak acid-strong base is greater than the pH of the strong acid-strong base.

C. At the half-equivalence points, the pH of the weak acid-strong base is greater than the pH of the strong acid-strong base.

D. The steep-rise interval in the weak acid-strong base curve is more pronounced than in the strong acid-strong base curve.

Answers

The steep-rise interval in the weak acid-strong base curve is more pronounced than in the strong acid-strong base curve because the weak acid requires more titrant to be neutralized than the strong acid, so the pH changes more slowly initially.

A. The initial pH for the weak acid-strong base curve is higher than the initial pH for the strong acid-strong base curve.

This statement is inaccurate. In fact, the initial pH for the weak acid-strong base curve is lower than the initial pH for the strong acid-strong base curve. This is because a weak acid has a higher initial pH than a strong acid due to the lower concentration of H+ ions in solution.

B. At the equivalence points, the pH of the weak acid-strong base is greater than the pH of the strong acid-strong base.

This statement is accurate. At the equivalence point of a weak acid-strong base titration, the pH is greater than 7 due to the presence of the conjugate base of the weak acid in solution. At the equivalence point of a strong acid-strong base titration, the pH is 7.

C. At the half-equivalence points, the pH of the weak acid-strong base is greater than the pH of the strong acid-strong base.

This statement is accurate. At the half-equivalence point of a weak acid-strong base titration, the pH is greater than 7 because the solution contains both the weak acid and its conjugate base. At the half-equivalence point of a strong acid-strong base titration, the pH is 7.

D. The steep-rise interval in the weak acid-strong base curve is more pronounced than in the strong acid-strong base curve.

Learn more about concentration here:

https://brainly.com/question/13872928

#SPJ1



write the balanced molecular equation for the following:

A sample of nitrosyl chloride gas, NOCI, was placed in a reactor and heated to
227°C until the system reached equilibrium. The contents of the reactor were then
analyzed and found to contain gaseous chlorine and nitrogen monoxide.

Answers

The balanced molecular equation when nitrosyl chloride gas, NOCI, is heated to produce gaseous chlorine and nitrogen monoxide is:

2NOCl(g) ⇔ Cl₂(g) + 2NO(g)

How do i write the balanced molecular equation?

Chemical equation is simply a ritrogen monoxide epresentation of chemical reactions using the symbols and formula of elements. We must understand, that every reaction has two sides i.e reactants and products.

The balancing of chemical equation must obey the law of conservation of matter other wise, atoms will either be created or destroyed during the reaction.

Now we shall write the balanced molecular equation for the reaction invoving the heating of nitrosyl chloride gas, NOCI. Details below:

Nitrosyl chloride gas => NOClGaseous chlorine => Cl₂Nitrogen monoxide => NO

Nitrosyl chloride gas ⇔ Gaseous chlorine + Nitrogen monoxide

NOCl(g) ⇔ Cl₂(g) + NO(g)

There are 2 atoms of Cl on the right and 1 atom on the left. It can be balanced by writing 2 before NOCl as shown below:

2NOCl(g) ⇔ Cl₂(g) + NO(g)

There are 2 atoms of N on the left and 1 atom on the right. It can be balanced by writing 2 before NO as shown below:

2NOCl(g) ⇔ Cl₂(g) + 2NO(g)

Thus, the equation is balanced.

Learn more about balancing equation:

https://brainly.com/question/12192253

#SPJ1

part d.3. instead of conc nh, being added to the solution, 6 m naoh is added (both are bases). how will this affect the test for the identification of copper(ii) ion in the solution? explain.

Answers

We get the dark blue color precipitate which contains  [tex]Cu(NH3)4]^{2+}[/tex](aq.) complex ions of the solution when 6 M Na OH is added.

When the 6M Na OH is used instead of the NH3 in a solution then [tex]Cu^{2+}[/tex]ions will be precipitate out as the [tex]Cu(OH)_{2}[/tex]  in the solution. When the NH3 is used the [tex]Cu^{2+}[/tex] ions will form a complex with the NH3 in the solution which can be expressed as,

[tex]Cu^{2+}[/tex] + [tex]4NH_{3}[/tex] ----> [[tex]Cu(NH3)4]^{2+}[/tex] (aq.) + 2[tex]OH^{-}[/tex](aq.)

The complex of the [tex]Cu^{2+}[/tex]  is soluble which gives dark blue color to the solution.

Therefore by using the 6 M Na OH we can get the blue precipitate of the  [tex]Cu(OH)_{2}[/tex] . Precipitation is defined as the process of transforming a dissolved substance of the solution into an insoluble solid. The solid formed is called the precipitate of the solution.

and by using the NH3 we can get the dark blue color of the solution that contains  [tex]Cu(NH3)4]^{2+}[/tex](aq.) complex ions of the solution.

To learn more about Precipitate

https://brainly.com/question/30764379

#SPJ4

The correct question is,

Instead of conc. NH3 being added to the solution, 6 M Na OH is added (both are bases). How will this affect the test for the identification of copper(II) ion in the solution. Explain

Other Questions
What cycle time would match capacity and demand if demand is 300 units a day, there are three shifts of 420 minutes each, and workers are given four half hour breaks during each shift. the staff in stores like bestbuy (that sells electronics) and gamecenter (that sells music-related products) are highly knowledgeable regarding the products the store offers so that they can guide consumers in making choices most appropriate to their requirements. such retailers are classified as martinez co. has a loss contingency to accrue. the loss amount can only be reasonably estimated within a range of outcomes. no single amount within the range is a better estimate than any other amount. the amount of loss accrual should be ILL GIVE 200 POINTS IF ITS DONE CURRENTLY PLS HELPP ITS DUO TODAY!!1. What is the purpose of each of the two political advertisements? What do the ads want you, the voter, to do, and how do you know that? What reasons do the ads offer in support of this purpose? 2. Describe the perspectives behind the two political ads. Then, for each ad, explain how its perspective leads to examples of bias. 3. Identify at least one example of pathos in either of the two advertisements. Explain how this appeal helps the campaign's purpose. 4. Identify at least one example of ethos in either of the two advertisements. Explain how this appeal helps the campaign's purpose. 5. Identify at least one example of logos in either of the two advertisements. Explain how this appeal helps the campaign's purpose. 6. Describe how either of the advertisements uses media other than the spoken word to be persuasive. Do these examples of media use pathos, logos, or ethos or a combination of appeals? Why? 7. Identify at least three rhetorical devices, such as analogy, juxtaposition, antithesis, zeugma, or figurative language, in either of the advertisements. Explain how these devices help each campaign's purpose. 5.66. what is the probability that an irs auditor will catch only 2 income tax returns with illegitimate deduc-tions if she randomly selects 5 returns from among 15 returns, of which 9 contain illegitimate deductions? A farmer wants to estimate the number of moles in a local area she catches and tags 30 moles, then releases them back into the local area a few days later the farmer catches another sample of the miles and finds that half of them have a tag estimate the total number of moles in the local area Identify and explain onerhetorical device used bySenator Hill.(1-2 sentences) a machine that is programmed to package 1.60 pounds of cereal is being tested for its accuracy in a sample of 40 cereal boxes, the sample mean filling weight is calculated as 1.62 pounds. the population standard deviation is known to be 0.06 pounds. find the 95% confidence interval for the mean. Vary the plane of intersection, and note all the types of cross sections you observe. In the table, describe the shape of the cross section formed when a particular plane passes through the pyramid. where did the boomer colonies start from a car pull a truck with a force of 1500N The truck move a distance of 10m in 15s, what is the work and the power What was the connection between president wilsons fourteen points and germanys surrender?a. the fourteen points were based on the terms of the surrender.b. the fourteen points were unilaterally accepted by germanys adversaries, leading to germanys surrender c. the fourteen points established the terms for germanys surrender. d. the fourteen points were developed in consultation with germanys leaders. How did activists organize after the death of Matthew Shepard? EXPLAINING CAUSE AND EFFECT Fill in the chart below to describe how elements of thenatural world impacted culture in the Americas.Natural ElementsWeatherGeographyAnimalsImpact on Culturelow to record the ways that competition for resources impacted A portfolio has a value P(E, S), so that the value P is a function of E, the price of a Euro in Canadian dollars, and S, the level of the TSX stock index. Presently the portfolio is worth $207,000, while a Euro is $1.50 Canadian, and the index is S = 18,000. If the partial derivatives of P have values P E = 80,000, and P S = 20, what approximately will the portfolio value be if the price of a Euro goes down by 0.07 and the stock index goes down by 629? the greek word eudaimonia refers to group of answer choices the good or flourishing life. balance in all things. success in athletics. knowledge of the past. Compare or contrast Americans' attitudes towards banking and investing in the 1920s and after the 1930s. Kaira collects data on the costs of maracas: $12.50, $13.00, $13.25, $14.25,$14.50, $14.50, $14.50, $14.75, $15.75, $16.00, $16.50. Explain why a stem-and-leafplot would be an appropriate display to use to analyze and interpret the data. if a monopolistically competitive firm is producing 50 units of output where marginal cost equals marginal revenue, total cost is $1,674 and total revenue is $2,000, its average profit is a. $40 b. $326 c. $6.52 d. impossible to determine without additional information. 3) Describe two features of a digital audio workstation that can be used to enhance a podcast.