Choose the correct answer for each question.

- How many milliliters of 6.0 M HNO
_{3}are needed to prepare 500 mL of 0.50 M HNO_{3}?- 0.25 mL
- 40 mL
- 15.76 mL
- 300 mL
- None of these are correct

- Which of the following compounds is expected to be the most soluble in water?
- CH
_{3}-CH_{2}-CH_{2}-CH_{3} - CH
_{4} - CH
_{3}-OH - CH
_{3}-CH_{2}-O-CH_{2}-CH_{3} - CH
_{3}-CH_{2}-CH_{2}-CH_{2}-OH

- CH
- Find the mass percent of ZnSO
_{4}in a solution whose density is 1.25 g/mL and whose molarity is 1.19 M.- 15.4 %
- 0.2 %
- 23.0 %
- 78%
- 31.1%

- Find the mole fraction of the ZnSO
_{4}in a solution whose density is 1.25 g/mL and whose molarity is 1.19 M ZnSO_{4}.- 1.02
- 0.575
- 0.0199
- 4.09
- 0.174

- Find the molality of a solution of ZnSO
_{4}whose density is 1.25 g/mL and whose molarity is 1.19 M.- 1.12
*m* - 5.31
*m* - 0.970
*m* - 0.0571
*m* - None of these

- 1.12
- Which of the following solute/solvent pairs best represents the principle of "like dissolves like"?
- carbon dioxide in water
- lipids (fats) in water
- salt in hexane
- hydrogen chloride in water
- potassium iodide in benzene

- The vapor pressure of water at 25.0°C is 23.8 torr. Determine the mass of sodium chloride needed to add to 400 mL of water to change the vapor pressure to 22.8 torr. Assume the density of water to be 1.0 g/mL.
- 0.12 g
- 54 g
- 117 g
- 8.15 g
- None of these

- Of the following compounds, which are not likely to increase in solubility as the temperature of the solution increases?

1. CH_{4}

2. NaBr

3. CO_{2}

4. Glucose, C_{6}H_{12}O_{6}

5. CuSO_{4}- 1 and 4
- 2 and 3
- 1 and 3
- 4 only
- 5 only

- At a given temperature the vapor pressure of pure liquid diethyl ether and isopropyl alcohol are 730 torr and 310 torr, respectively. A solution prepared by mixing isopropyl alcohol and diethyl ether obeys Raoult's law. At this temperature, what is the vapor pressure of diethyl ether over a solution in which its mole fraction is 0.270?
- 197 torr
- 281 torr
- 1040 torr
- 15.7 torr
- 0.912 torr

- Which of the following properties is dependent on the amount
__and__identity of the solute particles?- Freezing point of the solution
- Boiling point of the solution
- Osmotic pressure
- Solution density
- None of these

- How many grams of Al
_{2}(SO_{4})_{3}do you need to make 87.62 g of 0.0162*m*Al_{2}(SO_{4})_{3}solution?- 5.54 g
- 0.483 g
- 0.0751 g
- 194 g
- 1005 g

- When 18.0 grams of a substance is dissolved in 500 grams of water, the freezing point is depressed by 0.31°. What is the molar mass of the solute?
- 3.0 g
- 108 g
- 216 g
- 54 g
- 1018 g

- You are given the problem of lowering the freezing point of H
_{2}O from 0°C to 0°F (-17.8°C), what volume of methyl alcohol (CH_{3}OH) should you add to 10.0 liters of H_{2}O? The density of CH_{3}OH is 0.787 g/mL. Assume the density of the water to be exactly 1.00 g/mL.- 32.05 mL
- 316 mL
- 402 mL
- 4.02 L
- None of these

- Two sodium chloride solutions are separated by a semipermeable membrane. The concentration of solution "A" is 0.50 M and the concentration of solution "B" is 0.250 M. Over time, there will be a measurable movement of:
- water from solution A to B
- water from solution B to A
- sodium chloride from solution A to B
- sodium chloride from solution B to A
- Two of these are correct

- The expected (ideal) van't Hoff factor for a dilute solution of sodium sulfate is:
- 1
- 2
- 3
- 4
- 5

- A 0.250 M solution of CaCl
_{2}has an observed osmotic pressure of 10.1 atm at 23°C. Determine the observed van't Hoff factor for this experiment.- 1.67
- 2.73
- 1.22
- 0.976
- 0.002

- How many grams of calcium chloride are needed to prepare 300 mL of a 0.250 M solution?
- 832 g
- 5.66 g
- 566 g
- 112 g
- 8.32 g

- Calculate the osmotic pressure (in torr) of 7.50 liters of an aqueous 0.210 M solution of silver nitrate at 25°C, assuming 100% dissociation.
- 10.3 torr
- 7.81 x 10
^{3}torr - 0.86 torr
- 655 torr
- 1100 torr

- Which of the following solutions would be expected to experience the largest deviation from the expected van't Hoff factor?
- 1.5 M NaCl
- 0.5 M CH
_{3}OH - 1.0 M glucose
- 0.010 M NaCl
- Both NaCl solutions would have the same deviation

- What is the percentage by mass of ethanol (C
_{2}H_{5}OH) in a 1.5*m*solution?- 65%
- 29%
- 18.8%
- 6.5%
- 0.057%