A student measures the molar solubility of nickel(II) cyanide in a water solution to be 2.00×10-8 M. what is the ksp
Answer:
27.871×10−24
Explanation:
The molar solubility of nickel(II) cyanide is 1.91×10−8M.
The nickel (II) cyanide dissociates in water as shown below
Ni(CN)2(s)↔Ni2+(aq)+2CN−(aq)s2s
Where, s is the solubility of nickel (II) cyanide.
The value of solubility product of nickel(II) cyanide is calculated by the formula given below.
Ksp=[Ni2+][CN−]2
Substitute the values in the above formula. Ksp=(1.91×10−8M)(2×1.91×0−8M)2=27.871×10−24
3. During an experiment, 98 g of water is used in the Styrofoam cup. The initial temperature
of water was 23.7°C. A 39.9-g piece of metal with initial temperature of 100.3°C (after
removing from the boiling water) is added to the calorimeter. The final temperature of water
was 28.2°C.
Answer:
This is easy, first you just...
Explanation:
I lied I have no idea, good luck tho
molar solubility of chromium(III) hydroxide in a water solution to be 1.28×10-8 M. what is the solubility product CONSTANT? 6.7 × 10-31 is the ksp at 25 c
At 25 °C, chromium(III) hydroxide has a dissolution rate constant (Ksp) of 6.74 10–31.
Why would someone employ hydroxide?Manufacturers can use sodium hydroxide to create products including soap, rayon, paper, explosives, pigments, and petroleum goods. Sodium hydroxide can also be used for cleaning or processing metal, oxidizing surfaces, electroplating, and electrolytic extraction.
Cr(OH)3(s) = Cr(OH)3(aq) + 3OH- (aq)
Ksp = [Cr3+] is the expression for the Ksp in this equilibrium.
[OH-]^3
It is said that Cr(OH)3 is 1.28 10-8 M molar solubility. Hence, the saturated solution's Cr3+ and OH- ion concentrations are both 1.28 10-8 M.
The Ksp expression is obtained by substituting the concentration values: Ksp = [Cr3+].
[OH-]^3 = (1.28×10^-8 M)(3(1.28×10^-8 M))^3 = 6.74×10^-31
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how many liters of hydrogen gas at stp will be produced by reacting 3.4 grams of sodium with excess water?
(B) How many grams of hydrogen would be produced?
The result would be the production of 0.149 grammes of hydrogen gas. At STP, 1.64 litres of hydrogen gas will be created.
What is any gas's STP?Simply put, STP is 0 °C (273.15 K) and 1 atm of pressure (the old standard). You may determine the volume of an ideal gas at STP by entering those numbers into the ideal gas law and using exactly 1 mole of gas. It has a 22.4 L volume.
The chemical equation for the reaction of sodium and water is as follows:
2Na + 2H2O → 2NaOH + H2
Determine how many moles of sodium are contained in 3.4 grammes:
sodium (Na) has a molar mass of 22.99 g/mol.
3.4 g/22.99 g/mol (moles of Na) is equal to 0.148 mol.
Na = 1/2 moles, H2 = 1/2 moles, 0.148 mol, and 0.074 mol, respectively.
Calculate the volume of hydrogen gas at STP using the ideal gas law:
PV = nRT
V = nRT/P
= (0.074 mol) × (0.0821 L·atm/mol·K) × (273 K) / 1 atm
= 1.64 L
Therefore, 1.64 liters of hydrogen gas will be produced at STP.
hydrogen (H2) has a molar mass of 2.02 g/mol.
moles of H2 = 0.074 mol
mass of H2 = moles of H2 × molar mass of H2
= 0.074 mol × 2.02 g/mol
= 0.149 g
Therefore, 0.149 grams of hydrogen gas would be produced.
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What step might be included when optimizing a design solution?
What are two processes that must occur to form soil?
Question 1 options:
weathering breaks rocks into minerals and plants die and decay
erosion and weathering
Plants produce loam and plants produce humus
erosion transports mineral particles and plants die and decay
Erosion and weathering are two processes that must occur to form soil.
What is soil formation?Soil formation is the process by which soil is created over time through the physical, chemical, and biological interactions between rocks, minerals, organic matter, water, air, and living organisms.
Soil formation is a slow and complex process that can take centuries or even millennia, and it can be influenced by a variety of factors, including climate, topography, parent material, time, and human activities.
What is erosion and weathering?Weathering refers to the physical and chemical processes that break down rocks and minerals at or near the Earth's surface.
Erosion, on the other hand, refers to the movement and transport of weathered materials, such as soil, rock fragments, and sediment, by water, wind, or glaciers. This can result in the reshaping of landscapes, the creation of new landforms, and the deposition of sediments in new locations.
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Identify why this might be a scam: "My kid brother is no longer able to go to the game since he just went into the hospital. We want to make sure the tickets don't go to waste."
Answer:
This might be a scam because it is a common tactic used by scammers to evoke sympathy from their targets. By appealing to the target's emotions, they may be more likely to overlook any warning signs and take action without thinking. Additionally, the urgency of the request (i.e., the tickets could go to waste) may pressure the target to act quickly without considering the potential risks. Scammers may use similar tactics to obtain personal information or money from their targets, so it's always important to be cautious when receiving unsolicited requests.
Explanation:
the maximun number of electrons that a 3p sublevel can hold is ?
The 3p subshell can carry a maximum of 6 electrons, which is the maximum number an electron can be held by a 3p sublevel.
What types of things are electrons?The electron is the lowest atom-forming particle or a carrier of such a negative charge. The protons in an atom that is neutral are all the same. For example, the hydrogen atom only contains one proton and one electron. The uranium atom is unique due to its 92 protons & 92 electrons.
Why are there electrons in an atom?The negatively charged atom's electrons are responsible for this. An atom's total negative charge, which is produced by all of its electrons, counteracts the positive electrical charge of a protons inside the atomic nucleus.
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Carlos records the following observations during a science lab: moves objects without touching them flows through a wire creates a magnetic field Did Carlos observe a magnetic or an electric interaction?
The moving particles around a loop of wire creates magnetic field by the electromagnetic induction. Hence, the field is created by the magnetic interactions of electrons.
What is electromagnetic induction ?Using the interaction between electricity and magnetism, electromagnetic induction creates a magnetic field around a single wire when an electric current flows through it.
The magnetic field is substantially enhanced if the wire is twisted into a coil, creating a static magnetic field around itself in the shape of a bar magnet with a clear North and South pole.
The magnetic flux that formed around the coil was inversely proportional to the current running through its windings. The static magnetic field strength would be strengthened if additional layers of wire were coiled onto the same coil with the same current running through them. Therefore, Carlos observe a magnetic interaction.
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Create a graph of the number of moles of carbon dioxide (CO₂) gas formed (y-axis) versus the number of moles of sodium
carbonate (Na₂CO3) added (x-axis). Use the graph to identify the limiting reactant in each of the flasks.
Flask #
1
2
3
4
5
6
7
Limiting Reactant
Na₂CO3 -
H2SO4
The amount of CO2 produced per unit of initial NaHCO3 is 1:2, or one mole of CO2 for every one mole of initial NaHCO3.
Why is carbonate referred to as CO3?Carbonate is the term used to describe the material with the chemical formula CO3. With an electric charge of 2, carbonate is a compound made up of 1 carbon atom and 3 oxygen atoms. Due to the carbonate ion's negative charge, there are two more electrons than protons in each carbonate ion.
What purposes serve carbonates?The primary applications for carbonates are as natural resources in a variety of industrial processes, including the development of pharmaceuticals, glass production, pulp and paper manufacturing, sodium substances, soap but instead detergent manufacturing, paper industry, ballast water treatment production, clay and design and build procurement, among others.
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Water is not the only resource used to generate electric energy. What other processes are used to produce electrical energy? Research and then create a diagram showing one of the processes and the energy transfers that happen to produce electrical energy. Indicate where forces do work. Present your diagram to the class.
The forces that do work include gravity, the force of the flowing water, and the mechanical force of the turbine turning.
What is Electrical Energy?
It can be generated by a variety of methods, including the conversion of other forms of energy such as mechanical, chemical, or solar energy. Electrical energy is the form of energy that is used to power most of the devices and machines we use in our daily lives, from household appliances to transportation systems and industrial equipment. It is a versatile form of energy that can be easily transported over long distances using power grids and can be converted into other forms of energy such as heat, light, or motion.
There are several processes used to produce electrical energy, some of which include:
Nuclear power plants: These use nuclear reactions to generate heat, which then produces steam that drives a turbine to generate electricity.Fossil fuel power plants: These burn coal, natural gas, or oil to produce steam that drives a turbine.Hydroelectric power plants: These use the flow of water to turn a turbine and generate electricity.Wind turbines: These use the force of wind to turn a turbine and generate electricity.Learn more about Electrical Energy from given link
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Which of these is an example of a medical use for radiation?
A. irradiating strawberries to kill bacteria.
B. listening to the music on the radio.
C. locating leaks in a petroleum pipeline.
D. treating thyroid cancer with l-131.
Answer:
D. treating thyroid cancer with l-131
Explanation:
Radiation can be in the form of particles or waves. In medicine, it is very effective at treating cancer. One way in which a type of radiation that can do this is gamma rays, so many of them are fired at the cancerous cells. This can be dangerous if healthy tissue is damaged around the area, so calculations are done to see how much gamma rays should be fired to ensure that the cancerous cells are killed.
How many protons are in 1.801 x 1021 lithium atoms?
What's the point group of porphyrin and H2TPP, respectively?A. D2h; D4hB. D4h; D2hC. C2h; C4hD. C4h; C2h
The point group of porphyrin is D4h, and the point group of H2TPP (dihydrogen tetraphenylporphyrin) is D2h.
What is porphyrin ?
Porphyrins are a group of organic compounds that have a characteristic heterocyclic macrocycle structure known as a porphyrin ring. The porphyrin ring is composed of four pyrrole subunits linked together by methine bridges. Porphyrins are widely distributed in nature, and they are essential components of many biological molecules, including hemoglobin, myoglobin, and chlorophyll.
In addition to their biological roles, porphyrins have important applications in materials science, catalysis, and medicine. For example, porphyrins can be used as photosensitizers in photodynamic therapy, a treatment for cancer and other diseases that involves the activation of light-sensitive drugs to destroy cancer cells. Porphyrins also have interesting optical and electronic properties that make them useful in the development of sensors, photovoltaic cells, and other electronic devices.
The point group of porphyrin is D4h, and the point group of H2TPP (dihydrogen tetraphenylporphyrin) is D2h.
Porphyrin has a fourfold rotation axis (C4), four twofold rotation axes (C2), two mirror planes (σh), and a center of inversion (i), resulting in the point group D4h.
H2TPP is a derivative of porphyrin, but it lacks one of the four phenyl groups. Therefore, it has only two perpendicular mirror planes (σh) and a C2 rotation axis, resulting in the point group D2h.
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need some really big help on this i’ll give some really good points.
The excess reagent in the given reaction is Cl₂.
What is excess reagent?An excess reactant is a substance that is not wholly consumed or entirely reacted in a chemical reaction. It is also known as an excess reagent.
Let us consider the following reaction of the formation of sodium chloride.
2Na(s)+Cl₂(g) → 2NaCl(s)
Sodium metal reacts with diatomic chlorine gas. The above equation indicates that 2 moles of sodium will react with 1 mole of chlorine. If we have equivalent moles of sodium and chlorine,
Then sodium will be a limiting reactant, while chlorine will be an excess reactant.
Given,
ZrSiO₄ + 2Cl₂ → ZrCl₄ + SiO₂ + O₂
Cl₂ is the excess reagent.
Therefore, The excess reagent in the given reaction is Cl₂.
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Explain energy transfer between a cup of water and the air in a room if they are in equilibrium. How can this be measured?
Answer:
Convection. Convection is the transfer of heat by actual movement of mass within a fluid. Convection is a very important means of energy transport in the atmosphere, especially moist convection.
(I'm not so sure abt this, but worth a a shot!)
Good luck!
In the equation 2Li2O(s)=O2(g)+4L(i)
We heat 25g of Li2O until no more oxygen is produced.
q) How many L of oxygen is expected to be produced.
In the given equation 5.96 L of O2 will be produced.
What is chemical equation?
A chemical equation is a symbolic representation of a chemical reaction that shows the reactants on the left side and the products on the right side, with the coefficients indicating the relative amounts of each substance involved. It follows the law of conservation of mass, which states that mass cannot be created or destroyed in a chemical reaction.
The balanced equation for the reaction is:
2Li₂O(s) → O₂(g) + 4Li(s)
From the equation, we can see that 2 moles of Li₂O produces 1 mole of O₂. We can use this ratio to convert the mass of Li₂O to moles of O₂
First, we need to calculate the number of moles of Li₂O:
n(Li₂O) = m/M
where m is the mass of Li₂O and M is the molar mass of Li₂O. The molar mass of Li₂O is:
M(Li₂O) = 2(M(Li) + M(O)) = 2(6.941 g/mol + 15.999 g/mol) = 45.88 g/mol
Plugging in the values, we get:
n(Li₂O) = 25 g / 45.88 g/mol = 0.544 mol
According to the balanced equation, 2 moles of Li₂O produce 1 mole of O2. So, the number of moles of O2 produced is:
n(O2) = 0.544 mol / 2 = 0.272 mol
Finally, we can convert the number of moles of O2 to liters using the ideal gas law:
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. Assuming the reaction occurs at standard temperature and pressure (STP), which is 0°C (273.15 K) and 1 atm, we can simplify the equation to:
V = nRT/P
Plugging in the values, we get:
V = (0.272 mol) (0.08206 L·atm/mol·K) (273.15 K) / 1 atm = 5.96 L
Therefore, we can expect 5.96 L of O2 to be produced.
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If 62.0 grams of magnesium metal react with excess hydrochloric acid, how many liters of hydrogen gas can be produced at 200.0 K and 0.945 atmospheres? Mg + 2HCl → H2 + MgCl2
Volume that the hydrogen gas occupying = V Three moles of hydrogen are present. V = 74.04 L for PV=nR.
What is hydrogen fuel, sometimes known as H2?Hydrogen is typically a gas with the formula H 2 made up two diatomic molecules. It is exceedingly combustible, tasteless, colorless, odorless, & non-toxic. Hydrogen is the most common chemical in the universe, accounting for around 75% of any and all ordinary matter.
How is gaseous hydrogen made?High-Temperature Water Splitting: Chemical reactions which split water into hydrogen are fueled by high temperatures generated by light concentrators or nuclear reactors. Photobiological Water Splitting: Bacteria, such as alga, consume water with in presence of sunshine and make hydrogen as a byproduct.
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Small changes in traits that cause variation are frequently caused by
Small changes in traits that cause variation are frequently caused by mutation.
What is Mutation?This is an alteration in the nucleic acid sequence of the genome of an organism, virus, or extrachromosomal DNA which could contain either DNA or RNA.
Genetic variation on the other hand is the difference in DNA among individuals or the differences between populations and it is caused by mutation which is what is responsible for the difference in the features which are observed in an organism thereby making it the correct choice.
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Provide the electron dot structure, the molecular formula, and the structural formula for the molecular compounds that will form from their respective atoms below.
Phosphorus 1 and Oxygen 4
Nitrogen 1 and Oxygen 1
Ammonia NH3 and Hydrogen ION H+
Boron 1 and Nitrogen 1
Please help this is for a quiz I need soon
Answer:
Phosphorus 1 and Oxygen 4:
Electron dot structure:
.. .
: P :: O :
.. .
Molecular formula: P4O10
Structural formula:
O
//
O=P-O-P=O
�
O
Nitrogen 1 and Oxygen 1:
Electron dot structure:
: N :
. .
:O:
. .
Molecular formula: NO
Structural formula:
O
//
N=O
Ammonia NH3 and Hydrogen ION H+:
Molecular formula: NH4+
Structural formula:
H
|
H - N - H
|
H
Boron 1 and Nitrogen 1:
Electron dot structure:
: B :
. .
: N :
. .
Molecular formula: BN
Structural formula:
N
/
B=N
Explanation:
ANSWER THE FOLLOWING:
To make a 5.0 M BaOH with 750mL, how many moles of BaOH are necessary?
The moles of BaOH necessary are 3.75 moles.
What is Mole?The mole is an amount unit similar to familiar units like pair, dozen, gross, etc. It provides a specific measure of the number of atoms or molecules in a bulk sample of matter.
A mole is defined as the amount of substance containing the same number of atoms, molecules, ions, etc. as the number of atoms in a sample of pure 12C weighing exactly 12 g.
Given,
Concentration = 5M
Volume = 750 ml
Moles = Concentration × volume
= 5 × 0.75
= 3.75 moles
Therefore, the moles of BaOH necessary are 3.75 moles.
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How many kJ are required to heat 62.0 g of ethanol (C₂H5OH) from -2.84 °C to 92.6 'C? The bolling point of ethanol is 78.2 °C while the freezing point is -114.1 °C. The specific
heat capacity of ethanol as a follows: Cs liquid 2.57 J/g °C and Cs gas-1.60 J/gºC. The enthalples of fusion and vaporization are 4.90 kJ/mol and 42.32 kJ/mol, respectively.
Temperature (
78.2°C
-114.1°C
Progress
The amount of energy required to heat 62.0 g of ethanol from -2.84 °C to 92.6 °C would be 62.06 kJ.
Energy calculationFirst, we need to calculate the energy required to heat ethanol from -2.84°C to its boiling point of 78.2°C:
q1 = m * Cs * ΔT = 62.0 g * 2.57 J/g °C * (78.2 °C - (-2.84) °C) = 11,893.04 JNext, we need to calculate the energy required to vaporize ethanol at its boiling point:
q2 = n * ΔHvap = (62.0 g / 46.07 g/mol) * 42.32 kJ/mol = 57.08 kJFinally, we need to calculate the energy required to heat the vaporized ethanol from 78.2°C to 92.6°C:
q3 = m * Cs * ΔT = (62.0 g / 46.07 g/mol) * 1.60 J/g °C * (92.6 °C - 78.2 °C) = 5.12 kJThe total energy required is the sum of q1, q2, and q3:
qtotal = q1 + q2 + q3 = 11,893.04 J + 57.08 kJ + 5.12 kJ = 62.06 kJTherefore, 62.06 kJ of energy are required to heat 62.0 g of ethanol from -2.84°C to 92.6°C.
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Chlorophyll is a class of green pigments that plants use to absorb energy from the sun during photosynthesis. One type of chlorophyll is 6.27% N by mass, and each chlorophyll molecule contains 4 nitrogen atoms. Calculate the molar mass of this type of chlorophyll.
Using the fact that 100 g of chlorophyll an is equal to 0.11191 moles of chlorophyll a, we can now convert the amount of magnesium contained in 100 g of chlorophyll a to moles using the molar mass of magnesium.
What benefits does chlorophyll provide to your body?Supplement manufacturers assert that chlorophyll has a wide range of benefits, including the ability to increase red blood cells, aid in weight reduction, mend damaged skin, remove toxins, reduce inflammation, and prevent cancer. Although the list is impressive, just a few of the assertions are supported by scientific data.
Is daily consumption of chlorophyll a good idea?The FDA states that people of all ages over the age of 12 can easily take 100 mg to 200 mg of oral bengal gram daily as a supplement to relieve odor.
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Starting with the following equation, P_{4}(s) + F_{2}(g) > P*F_{3}(g) calculate the moles of that will be required to produce 27.5 grams of PF3
Accοrding tο the equatiοn 0.4006 mοl οf PF₃ will be required tο prοduce 27.5 grams οf PF₃.
What is mοl?Mοl is a unit οf measurement fοr the amοunt οf a substance. It is used tο measure the amοunt οf a particular element οr cοmpοund in a sample. Mοl is equal tο the number οf atοms, mοlecules, οr οther units in a sample. The size οf a mοl is determined by Avοgadrο's number, which is 6.022 x 10²³.
We first need tο calculate the mοlecular weight οf PF₃. This is dοne by adding up the atοmic masses οf the three atοms in the mοlecule.
P: 30.97 g/mοl
F: 18.99 g/mοl
Therefοre, PF₃ has a mοlecular weight οf:
30.97 + 18.99 + 18.99
= 68.95 g/mοl
Tο calculate the mοles οf PF₃ required tο prοduce 27.5 grams οf PF₃, we divide the mass οf PF₃ (27.5 g) by the mοlecular weight οf PF₃ (68.95 g/mοl):
27.5 g / 68.95 g/mοl
= 0.4006 mοl οf PF₃
Therefοre, 0.4006 mοl οf PF₃ will be required tο prοduce 27.5 grams οf PF₃,
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Find the percentage of calcium in calcium oxide and calcium phosphate
12% is the mass percentage of calcium in calcium oxide and calcium phosphate.
What is mass percentage?Mass percent is the means to indicate a concentration. Moreover, it specifies the element in a certain composition. A mass percentage can be used to understand the solution's composition.
It displays the amount of solute in a certain amount of solution. The solute's concentration is specified in terms of mass or moles.
mass percentage=(mass of calcium/ mass of calcium phosphate)×100
= (40/310.18)×100
=12%
Therefore, 12% is the mass percentage of calcium in calcium oxide and calcium phosphate.
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How many moles of gas are in a 15 L scuba canister if the temperature of the canister is 200 K and the pressure is 200 atms?
Taking into account the ideal gas law, there are 182.93 moles of gas in a 15 L scuba canister if the temperature of the canister is 200 K and the pressure is 200 atm.
Definition of ideal gas lawAn ideal gas is called a hypothetical or theoretical gas, which is composed of particles that move randomly and without interacting with each other.
An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law. This equation relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar gas constant:
P×V = n×R×T
Amount of moles in this caseYou know:
P= 200 atmV= 15 Ln= ?R= 0.082 (atmL)÷(molK)T= 200 KReplacing in the ideal gas law:
200 atm× 15 L = n× 0.082 (atmL)÷(molK)× 200 K
Solving:
(200 atm× 15 L) ÷ (0.082 (atmL)÷(molK)× 200 K)= n
182.93 moles= n
Finallt, there are 182.93 moles of gas.
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when calcium forms an ion then what is the most likely overall charge for the calcium ion?
Answer:
When calcium forms an ion, it loses two electrons from its outermost shell, resulting in a full valence shell with eight electrons in the inner shell. Therefore, the most likely overall charge for the calcium ion is 2+.
Explanation:
Chemical name of na2[mg2(po3)6]
Answer:
CalgonExplanation:
Greetings!!!
(NaPO3)6 Or Na2[Na4(PO3)6] is called Calgon, used to remove hardness of water. When the hard water is passed through Calgon.
Hope it helps!!!
Molar Solutions
A solution consists of two components: the solute, the dissolved material, and the solvent, the liquid in which the solute is dissolved. The amount of solute in a given amount of solution or solvent is known as the concentration. The two most common ways of expressing concentration are molarity and molality. Molarity (M) indicates the number of moles of solute per liter of solution (moles/Liter), abbreviated as M.
.This is one of the most common units used to measure the concentration of a solution. Molarity can be used to calculate the volume of solvent or the amount of solute.
Carrie's chemistry teacher asked her to make a 1 M sodium chloride solution. Carrie measured 58.44 grams NaCl, added it to a volumetric flask, and then added enough water to make a 1 liter solution. Her lab partner told Carrie that she had made the 1M solution incorrectly. How would you respond?
Responses
He is correct. Carrie should have added exactly 1 L of water to the flask.
He is correct. Carrie should have added exactly 1 L of water to the flask.,
He is correct. Carrie should have mixed 1 mole NaCl with 1 mole water in the flask.
He is correct. Carrie should have mixed 1 mole NaCl with 1 mole water in the flask.,
He is correct. Carrie should have used 1000 ml H2O.
He is correct. Carrie should have used 1000 ml H, 2, O.,
He is incorrect. Carrie mixed the 1M solution correctly .
He is incorrect. Carrie mixed the 1M solution correctly
How do you make 1 M of a solution?To make 1 M (molar) solution of a substance, you need to dissolve an amount of that substance in a solvent to make a solution with a concentration of 1 mole per liter (1 mol/L). The specific steps for making a 1 M solution will depend on the substance being dissolved and the solvent used.
Once the substance is completely dissolved, add more solvent to the flask until the desired volume is reached. Use a volumetric flask to ensure that the final volume is accurate.
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