10 Exam

Question 1

Unlike homogeneous solutions, the particles in a colloid are ______ and _____ through a semi-permeable membrane.

Answer 1

Visible, will not pass

Question 2

A _____ is a heterogeneous mixture which settles on standing and its components can be separated by filtration.

Answer 2

Colloid

Question 3

Solutions, ______, colloids, _______ light.

Answer 3

Unlike, will not scatter

Question 4

Metal alloys are an example of a _____ solution.

Answer 4

Solid-solid

Question 5

A solution is made by dissolving g of sodium lithium chloride in water to a final volume of 202 mL solution. What is the weight/weight % or percent by mass of the solute?

Answer 5

14.356436

Question 6

A solution is made by containing 4.6 g of sodium chloride per 250 g of water. What is the weight/weight% or percent by mass of the solute?

Answer 6

1.8

Question 7

How many mL of formic acid would you add to water to make 755 mL of a 25.0% formic acid solution (v/v%)?

Answer 7

194

Question 8

What is the percent by volume of ethanol in a solution made by dissolving 39.5 mL of ethanol in 215 mL of water?

Answer 8

15.5

Question 9

What is the molarity of a solution made by dissolving 18.9 g of ammonium nitrate (NH4NO3) in enough water to make 855 mL of solution?

Answer 9

.267

Question 10

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

Answer 10

244

Question 11

What volume (in L) of a 6.84 M sodium bromide (NaBr) solution would be needed to make 588 mL of a 1.84 M solution by solution?

Answer 11

158

Question 12

What volume (in L) of a 3.95 M potassium chloride (KCl) solution would be needed to make 325 mL of a 2.76 M solution by dilution?

Answer 12

.227

Question 13

A solution is made by dissolving 9.68 g of potassium chloride (KCl) in 565 g of water. What is the molality of the solution?

Answer 13

.230

Question 14

How many grams of sodium hydroxide (NaOH) are required to dissolve in 232 g of water to make a 2.88 m solution?

Answer 14

26.7

Question 15

What is the mole fraction of KCl in an aqueous solution that contains 26.3% KCl (weight/weight %)?

Answer 15

.0794

Question 16

What is the mole fraction of NaCl in a mixture of 0.564 g NaCl, 1.52 g K, and 0.857 g LiCl?

Answer 16

.402

Question 17

Li2SO4 _____ an electrolyte in solution.

Answer 17

Is

Question 18

CH3CHOHCH3 ______ an electrolyte in solution.

Answer 18

Is not

Question 19

If 1.23 g of chlorine gas dissolved in 0.95 L of water at 15.6 psi, at what pressure (in psi) would you be able to dissolve 1.89 g in the same amount of water?

Answer 19

24

Question 20

If 0.0106 g of a gas dissolved in 0.792 L of water at 0.321 atm, what quantity of his gas (in grams) will dissolve at 5.73 atm?

Answer 20

.239

Question 21

What is the freezing point (in degrees Celsius) of a 0.321 m aqueous solution of NaCl? Enter your rounded answer with three decimal places.

Answer 21

-1.194

Question 22

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

Answer 22

-2.764