1. The pH of a solution made by combining 150.0 mL of 0.10 M KOH with 50.0 mL of 0.20 M HBr is closest to which of the following?
Answers
Answer:
12
Explanation:
The pH of the solution prepared has been 1.25.
The pH of the solution resulting from the mixing of the two solutions can be given by:
Hydrogen ion concentration = [tex]\rm \dfrac{M_1V_1\;-\;M_2V_2}{V_1\;+\;V_2}[/tex]
Where, M1 and M2 have been the molarity of the solution and V1 and V2 have been the volume of the solutions.
For the given resulted solution:
Hydrogen ion concentration = [tex]\rm \dfrac{0.1\;\times\;0.15L\;-\;0.2\;\times\;0.05L}{0.15\;+\;0.05\;L}[/tex]
Hydrogen ion concentration = 0.055 M
pH can be defined as the negative logarithm of hydrogen ion concentration.
pH = - log (Hydrogen ion concentration)
pH = -log (0.055)
pH = 1.25
The pH of the solution prepared has been 1.25.
For more information about the pH of the solution, refer to the link:
https://brainly.com/question/4975103
Related Questions
Can someone help me ❤️❤️❤️
Answers
Answer:
i think the answer would be C
Explanation:
no matter what you do to the jar the mass will stay the same. unless you add more nails
if the solution is acidic, which ion is found in greater concentration?
Answers
Answer:
An acidic solution has a high concentration of hydrogen ions (H +start superscript, plus, end superscript), greater than that of pure water.
The acidic solution indicates the highest concentration of hydrogen or the proton ion in the solution.
What is acidity?Acidity is the measure of the hydrogen ion in the solution by the pH scale and gives the acidic or basic characteristics to the solution.
The concentration of the hydronium or the hydroxide in the solution is a way to determine the acidic basic nature and the pH and pOH of the solution.
Therefore, in an acidic solution hydrogen ions are in the greatest concentration.
Learn more about acid here:
https://brainly.com/question/24194581
#SPJ2
When balancing chemical equations, it is okay to adjust
(3 points)
A.
coefficients.
B.
superscripts.
C.
subscripts.
D.
any of these.
Answers
Answer:
A
Explanation:
Thats the correct anwers
A chemical equation representing the reaction of water (HOH) and hydrochloride acid (HCI) is shown.
HOH + HCl + Cl + H2O
Which of the following statements best explains the chemical action of the reactants in the equation?
Answers
Answer:
That is Hydrolysis reaction.
[tex]HCl _{(aq)} \: + \: _{(aq)} \: - - > \: H ^{ + }_{(aq)} \: + \: Cl {}^{ - } _{(aq)}[/tex]
PLEASE HELP!! 10 POINTS!
what could the fourth quantum number of a 2s^2 electron be?
Answers
Answer:
D. ms=+1/2.
Explanation:
Hello there!
In this case, since the quantum numbers are known as:
* Principal quantum number (n) which cannot be zero. The allowed values of n are therefore 1, 2, 3, 4, and so on.
* Angular quantum number (l) is able to be any integer between 0 and n-1. If n = 2, for example, l can be either 0 or 1.
* Magnetic quantum number (m) is able to be any integer between -l and +l. If l = 3, m can be either -3, -2, -1, 0, +1, +2 or +3.
* Spin Quantum Number (ms): ms = +½ or -½. Accounts for the orientation of the spin axis of an electron as it is able to spin in only one of two directions.
Thus, since the fourth quantum number is ms, spin, we infer that the answer is D. ms=+1/2 because it represents the positive spin on 2s^2.
Best regards!
Answer: ms = +1/2
Explanation: a pex
Predict what happens when tin metal is placed into
a solution of nickel(II) iodide.
A. Tin(II) iodide forms
B. Tin metal dissolves
C. Nothing
D. Both a and b happen
E. Nickel is plated onto tin
Answers
Answer:
I would say A but I'm not sure
When tin metal is placed into a solution of nickel (II) iodide then nothing will occur.
What is reactivity series?Reactivity series of the metals tells about the increasing or decreasing orders of the reactivity of the metals.
According to the reactivity series, reactivity of nickel metal is more than the tin metal. So, if we add tin metal in the solution of nickel (II) iodide then no reaction occurs. Because the reactivity of tin is less as compare to nickel metal so it is not possible for tin to replace the nickel metal and get dissolve.
Hence, option (C) is correct i.e. nothing.
To know more about reactivity series, visit the below link:
https://brainly.com/question/17469010
How many formula units are in 2.0 moles of Fe(NO3)2?
Answers
Answer:
1.2 x 10>24 (2.0)(6.022 x 10>23)
Explanation:
How many formula units are in 2.0 moles of Fe(NO3)2?
Mole measure the number of elementary entities of a given substance that are present in a given sample. 12.044×10²³ formula units are in 2 moles of Fe(NO₃)₂.
What is mole?The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number. Mole is inversely proportional to molar mass.
Mathematically,
Mole of Fe(NO₃)₂. =given number of atoms of Fe(NO₃)₂.÷ 6.022×10²³(Avogadro number)
mole of Fe(NO₃)₂= 2moles
Substituting the values
2=number of atoms of Fe(NO₃)₂.÷ 6.022×10²³
Number of atoms of Fe(NO₃)₂.=2×6.022×10²³
Number of atoms of Fe(NO₃)₂.=12.044×10²³
Therefore, 12.044×10²³ formula units are in 2 moles of Fe(NO₃)₂.
To know more about mole, here:
https://brainly.com/question/15209553
#SPJ3
65 g of NaOH is dissolved to make 500 mL of solution. Find moles of NaPH and Molarity of solution.
Answers
Answer:
3.25 M
Explanation:
Number of moles = mass/ molar mass
mass of NaOH = 65 g
Molar mass of NaOH = 40 g/mol
Number of moles of NaOH = 65g/40 g/mol = 1.625 moles
Let us recall that;
n = CV
n = number of moles of solute
C = concentration of solution
V = volume of solution
C = n/V
n = 1.625 moles
V = 500/1000 L = 0.5 L
C = 1.625 moles/0.5
C = 3.25 M
Which of these is a learned behavior of a dog?
1.Begging for food
2.Drinking water
3.Panting on a hot day
4.Chewing on a bone
Answers
How can the strength of an acid be determined using titration? (100 POINTS!)
Answers
Answer:
Explanation:
A titration in general is used to determine the concentration of something with a solution of known solution. For acid, a base solution of known concentration is added slowly. The end-point is determined by using a pH indicator. When the acid is neutralized at the end, note the amount of base solution used and the strength of acid can be calculated.
Note that the quantity of base solution utilised and the acid strength can be estimated after the acid has been neutralised.
What is titration?Titration is a method of chemical analysis where the quantity of a sample's constituents is established by adding a precisely measured amount of something else with which the component that is wanted will react in a specific, known proportion.
A burette, which is essentially a long, graded measurement tube with a stopper and a tube for injection at its bottom end, is used to gradually administer a standard solution of titrating reagent, and titrant, to a specified concentration. When the point of equal value is achieved, the addition is terminated. Note that the quantity of base solution utilised and the acid strength can be estimated after the acid has been neutralised.
Therefore, note that the quantity of base solution utilised and the acid strength can be estimated after the acid has been neutralised.
To know more about titration, here:
https://brainly.com/question/24704707
#SPJ2
PLZ HELP!
Where have you seen or known of examples of waves in your life? Based on science terms of a wave.
Answers
Answer:
I answered this in your recent post of this question.
Explanation:
Hope that this helps you out! :)
If you have any questions please put them in the comment section below this answer.
Have a great rest of your day/night!
Please thank me on my profile if this answer has helped you.
1.The symbol of an atom changes when the number of _______
changes.
2.The net charge of an atom depends on ___________ and
_________.
3.The atom is neutral when ________ and _________ are equal.
4.The mass number of an atom depends on __________ and
_________.
Answers
Answer:
1. proton
2. electrons and protons
3. protons and electrons
4. protons and neutrons
Explanation:
describe the three main concepts that make up cell theory
Answers
Explanation:
1.All living organisms are composed of one or more cells
2. The cell is the basic unit of structure and organisation in organisms
3.Cells arise from pre-existing cells
Image attached 50 points!
Answers
You know the number of moles of Mg that react: 6 moles.
You don't know (yet) how many moles of Mg₃N₂ are produced when 6 moles of Mg react.
The coefficients of each substance in the chemical equation tells us the molar ratio between the substances. The coefficient of Mg is 3, and the coefficient of Mg₃N₂ is 1 (coefficients of 1 are implied and omitted). So, for every 3 moles of Mg that react, 1 mole of Mg₃N₂ is produced.
We can use the proportion set up in the image to calculate the number of moles of Mg₃N₂ produced. In the first fraction, the green-boxed numerator should be our known number of moles of Mg, that is, 6 moles Mg. In the second fraction, we insert our molar ratio. Since we want the product of these two fractions to have the units "moles Mg₃N₂," the numerator in the second fraction should be 1 mole Mg₃N₂ and the denominator should be 3 moles Mg.
Our setup should look like this:
[tex]\frac{\textrm{6 moles Mg}}{1} \times \frac{\textrm{1 mole }\mathrm{Mg_3N_2}}{{\textrm{3 moles Mg}}} = \textrm{2 moles }\mathrm{Mg_3N_2}.[/tex]
Indeed, 2 moles of Mg₃N₂ are produced.
Answer:
2 moles of Mg₃N₂ are produced.
Explanation:
what is geography in science
Answers
During a tug-of-war, the rope accelerates towards the left. What is true about the forces acting on the rope?
Answers
Explanation:
Forces are given many names, such as push, pull, thrust, lift, weight, friction, and tension. Traditionally, forces have been grouped into several categories and given names relating to their source, how they are transmitted, or their effects. The most important of these categories are discussed in this section, together with some interesting applications. Further examples of forces are discussed later in this text.
What is an action citizens can take to prevent energy waste?
Answers
Answer:
Turning the lights off when they're not needed.
A building is found to be losing heat to the outside during the winter months. Which would be the best solution to correct this design problem?
increase amount of heating
increase surface area of walls
increase number of windows
increase thickness of insulation
no link or I will report
Answers
Answer:
increase thickness of insulation
Explanation:
don't increase amount of heating because that's difficult and not efficient.
don't increase surface area of walls because that makes heat be lost quicker.
don't increase windows because windows lose heat worse than walls.
increase thickness of insulation because it's the most effiecient and effective method of keeping heat.
Compare a low-dose rate internal radiation treatment to a high dose rate internal treatment. What do you think are the positives and negatives of each?
Answers
During intracavitary radiation, the radioactive source is placed in a body cavity (space) , such as the rectum or uterus.
With interstitial radiation, the implants are placed in or near the tumor, but not in a body cavity. The implant procedure is usually done in a hospital operating room designed to keep the radiation inside the room. You’ll get anesthesia, which may be either general (where drugs are used to put you into a deep sleep so that you don’t feel pain) or local (where part of your body is numbed).
One or more implants is put into the body cavity or tissue with an applicator, usually a metal tube or a plastic tube called a catheter. Imaging tests (an x-ray, ultrasound, MRI, or CT scan) are usually used during the procedure to find the exact place the implant needs to go.
Before being placed, implants are kept in containers that hold the radiation inside so it can’t affect others. The health professionals handling the implants may wear special gear that protects them from exposure once the implants are taken out of the container. High-dose-rate (HDR) brachytherapy allows a person to be treated for several minutes at a time with a powerful radioactive source that’s put in the applicator. The source is removed after 10 to 20 minutes. This may be repeated twice a day over a few days, or once a day over the course of a few weeks. The radioactive material is not left in your body. The applicator might be left in place between treatments, or it might be put in before each treatment.
People getting HDR sometimes stay in the hospital if it involves multiple day treatments and if the applicator is left in place. There may be special precautions to take after the treatment, so be sure to talk to the cancer care team about this. In this approach, the implant gives off lower doses of radiation over a longer period.
Some implants are left in from 1 to a few days and then removed. You’ll probably have to stay in the hospital, sometimes in a special room, during treatment. For larger implants, you might have to stay in bed and lie still to keep it from moving.
Some smaller implants (such as the seeds or pellets) are left in place and never taken out. Over the course of several weeks they stop giving off radiation. The seeds or pellets are about the size of rice grains and rarely cause problems. If your implants are to be left in, you may be able to go home the same day they’re put in. There may be special precautions to take, so be sure to talk to the cancer care team about this.
WILL MARK BRAINLEST
Use this image of a greenhouse to help explain how the Earth gets heated through the greenhouse effect.
Answers
Answer/Explanation:
The greenhouse effect is a natural process that warms the Earth's surface. When the Sun's energy reaches the Earth's atmosphere, some of it is reflected back to space and the rest is absorbed and re-radiated by greenhouse gases.
Earth's surface warms up in the sunlight. At night, Earth's surface cools, releasing heat back into the air. But some of the heat is trapped by the greenhouse gases in the atmosphere. That's what keeps our Earth a warm and cozy 58 degrees Fahrenheit (14 degrees Celsius), on average.
Which best describes the relationship between the terms frequency, wavelength, and hertz?
Answers
Answer:
The correct answer is - Frequency is the number of wavelengths, which is measured in hertz.
Explanation:
Frequency is the number of waves that go through a fixed point at a particular time. Hertz is the SI unit for frequency which means that one hertz is equal to a unit number of waver passes in a unit time to a fixed point.
As the frequency of a wave increases which means the number of waves increases in the unit time, the shorter the wavelength will be.
a higher frequency wave has more energy than a lower frequency wave with the same amplitude.
Why do we not use molecular formulae for polymers?
Answers
Answer:
Polymers are long chain molecules that occur naturally in living things and can also be made by chemical processes in industry. Plastics are polymers, so polymers can be extremely useful.
Explanation:
Determine the ions of ammonium, in 870.4x10-23 grams of (NH4)3PO4. Round the results to the tenths.
Answers
Answer: if your trying to say what 4x10-23 is the answer is 17
and if ur also trying to say whats 870.4x10-23 the answer is 8681 have a nice day!
Explanation:
also and what is (NH4)3PO4 if its a file code or link your not allowed to post that
PLEASE HELP
The theory of plate tectonics is supported by evidence that crustal plates move relative to each other. How does this observation support the theory of plate tectonics?
It suggests that plates are dragged around by ocean currents.
It suggests that plates are dragged around by air currents.
It suggests that plates can move independently of one another.
It suggests that plates cannot move independently of one another.
Answers
Answer:
non independantly
Explanation:
Calcium Carbonate decomposes at 1200°C to form carbon dioxide and
calcium oxide. If 25 L of carbon dioxide are collected at 1200°C, what will
the volume of this gas be after it cools to 25°C?
Answers
This is a Charles' Law problem: V1/T1 = V2/T2. As the temperature of a fixed mass of gas decreases at a constant pressure, the volume of the gas should also decrease proportionally.
To use Charles' Law, the temperature must be in Kelvin (x °C = x + 273.15 K). We want to solve Charles' Law for V2, which we can obtain by rearranging the equation into V2 = V1T2/T1. Given V1 = 25 L, T1 = 1200 °C (1473.15 K), and T2 = 25 °C (298.15 K):
V2 = (25 L)(298.15 K)/(1473.15 K) = 5.1 L.
The volume of this gas will be "5.1 L".
Given:
[tex]V_1 = 25 \ L[/tex][tex]T_1 = (1200+ 273 )K[/tex][tex]= 1473 \ K[/tex]
[tex]T_2 = (25+ 273)K[/tex][tex]= 298 \ K[/tex]
As we know,
→ [tex]\frac{V_1}{V_2} = \frac{T_1}{T_2}[/tex]
By substituting the values, we get
→ [tex]\frac{25 \ L}{V_2} = \frac{1473 \ K}{293 \ K}[/tex]
→ [tex]V_2 = \frac{25\times 298}{1473} \ L[/tex]
→ [tex]= 5.1 \ L[/tex]
Learn more:
https://brainly.com/question/21437107
What number represents a mole?
5
1
4
14
8
6
19
Answers
The half life of potassium 40 is approximately 1.25 billion years. An igneous rock is found to contain about 1/4 of its original mass of potassium 40. The approximate age of the rock is _____ billion years.
Answers
Answer:
2.5 billion years
Explanation:
Scientists create models for all of the following reasons, EXCEPT
A - because a model can represent objects too large to comprehend
B - because a model can help to communicate their ideas
C - because a model is the only way to conduct an experiment
D - because a model is the only way to represent objects too small to see
Answers
Thus, the correct answer choice here would be C.
1. The production of a slightly soluble solid compound in a double-
displacement reaction results in the formation of a
a. gas.
b. precipitate.
C. combustion reaction.
d. halogen.
Answers
Answer: precipitate
Explanation:
Materials that allow electrons to move easily from atom to atom are called _____________.
Answers
Answer:
Explanation:
conductors
Your welcome