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22 Apr 2023

Concentration review 2

All info is in the picture (need it done soon as possible please make sure it's your work and not copyright. Thanks)

For part two of our concentration review, we are going to look at dilution of molar solutions, molality, and the mole fraction.

 

When diluting molar solutions, you need to use the dilution equation. Give the equation below. This equation should only be used when performing dilutions!

 

Knowing how to dilute molar solutions is an important skill to have in chemistry. If you know the concentration and volume of the solution you want to make, you can determine the volume of stock solution you will need. For instance, if you have a 2.00 M sodium chloride stock solution, what volume, in mL, would you need to prepare 0.80 L of a 0.550 M sodium chloride solution? Show your work.

 

Detail how you would make the above solution.

 

 

Next, give the formula for molality.

 

 

How does this compare to molarity?

 

Finally, the mole fraction is the ratio of the number of moles of solute or solvent in solution to the total number of moles of solute and solvent. Give the formula for calculating the mole fraction.

 

Creating flashcards for the dilution of molar solutions, molality, and the mole fraction would be a good study tool!

 

Please give the formulas for each of the concentration descriptions listed.

 

Concentration Description	Formula
Percent by mass
Percent by volume
Molarity (M)
Dilution
Molality (m)
Mole fraction