10 Review

Question 1

The solvent in a colloidal system is also known as the _____ phase.

Answer 1

Dispersion medium

Question 2

_______ describes how small molecules can be selectively removed from a colloidal suspension while retaining large molecules.

Answer 2

Dialysis

Question 3

When a solid will not dissolve in a liquid, it is termed _______.

Answer 3

Insoluble

Question 4

Air is an example of a ______ solution.

Answer 4

Gas-gas

Question 5

A solution is made containing 4.92 g of sodium lithium chloride per 347 g of water. What is the weight/weight % or percent by mass of the solute?

Answer 5

1.4

Question 6

A solution is made containing 4.6 g of potassium chloride per 64.0 g of water. What is the weight/weight % or percent by mass of the solute?

Answer 6

6.7

Question 7

If 37.5 mL of methanol is dissolved in water to make 456 mL of solution, what it the concentration expressed in volume/volume % of the solute?

Answer 7

8.22

Question 8

How many mL of methanol would you add to water to make 250.0 mL of a 14.5% methanol solution (v/v%)?

Answer 8

36.25

Question 9

How many grams of sodium fluoride (NaF) are dissolved in 3.75 L of a 1.55 M solution?

Answer 9

244

Question 10

How many grams of magnesium sulfate (MgSO4) are dissolved in 0.965 L of a 0.0574 M solution?

Answer 10

6.68

Question 11

734 mL of a 1.13 M calcium sulfate (CaSO4) solution is diluted with 2.56 L of water. What is the new concentration in molarity?

Answer 11

.252

Question 12

516 mL of a 3.82 M sodium sulfate (Na2SO4) solution is diluted with 0.875 L of water. What is the new concentration in molarity?

Answer 12

1.42

Question 13

A solution is made by dissolving 42.3 g of potassium hydroxide (KOH) in 329 g of water. What is the molality of the solution?

Answer 13

2.29

Question 14

How many grams of sodium chloride (NaCl) are required to dissolve in 534 g of water to make a 0.875 m solution?

Answer 14

27.3

Question 15

What is the mole fraction of NaBr in an aqueous solution that contains 20.1% NaBr (weight/weight %)?

Answer 15

.0422

Question 16

If the mole fraction of Na2S in an aqueous solution is 0.125, aqueous solution is 0.125, what is the weight/weight % (percent by mass) of Na2S?

Answer 16

38.2

Question 17

CH3OH _______ ions in an aqueous solution.

Answer 17

Does not form

Question 18

Li2SO4 _____ an electrolyte in solution.

Answer 18

Is

Question 19

If 0.654 g of oxygen dissolved in 1.5 L of water at 1.65 atm, at what pressure (in atm) would you be able to dissolve 1.35 g in the same amount of water?

Answer 19

3.41

Question 20

If 0.0203 g of a gas dissolved in 1.39 L of water at 1.02 atm, at what pressure (in atm) would you be able to dissolve 0.146 g in the same amount of water?

Answer 20

7.32153292

Question 21

What is the boiling point (in degrees Celsius) of a 0.527 m aqueous solution of LiBr? Enter your rounded answer with 3 decimal places.

Answer 21

100.54

Question 22

What is the boiling point (degrees Celsius) of a 0.743 m aqueous solution of KCl? Enter your rounded answer with three decimal places.

Answer 22

100.761