Question 1

A nurse prepares an IV solution by diluting a concentrated saline solution. If 0.050 L of 2.0 M NaCl is diluted to a final volume of 1.0 L, what is the final molarity of the solution? Use the dilution equation.

Accepted Answer

$$0.20\ \mathrm{M}$$

Question 2

Which of the following best describes why a supersaturated solution is unstable?

Accepted Answer

It contains more solute than can normally dissolve at that temperature, so crystals can form easily.

Question 3

Which of the following mixtures is best classified as a colloid?

Accepted Answer

Milk

Question 4

A chemist needs to prepare 0.500 L of 0.200 M HCl from a stock solution of 1.00 M HCl. What volume of the stock solution should be used?

Accepted Answer

$$0.100\ \mathrm{L}$$

Question 5

Which of the following statements about the effect of temperature on solubility is correct?

Accepted Answer

The solubility of most solids increases with increasing temperature.

Question 6

Which of the following best explains why a suspension can be separated by filtration but a solution cannot?

Accepted Answer

Suspensions contain large particles that cannot pass through a filter, while solutions have particles too small to be filtered.

Question 7

A solution is prepared by dissolving 10.0 g of NaCl in enough water to make 250 mL of solution. What is the molarity of the solution? (Molar mass of NaCl = 58.44 g/mol)

Accepted Answer

$$0.684\ \mathrm{M}$$

Question 8

Which of the following is an example of a nonelectrolyte solution?

Accepted Answer

Sugar dissolved in water

Question 9

A 0.180 L sample of 0.600 M HNO$$_3 is $$diluted to 0.540 L. What is the new concentration?

Accepted Answer

$$0.200\ \mathrm{M}$$

Question 10

Which of the following best describes a colloidal dispersion?

Accepted Answer

A mixture with solute particles that are not uniformly distributed and cannot be separated by filtration.

Question 11

Which of the following will increase the solubility of a gas in a liquid?

Accepted Answer

Increasing the pressure above the liquid

Question 12

A laboratory technician needs to dilute 0.240 L of 1.50 M NaOH to a concentration of 0.400 M. What will be the final volume after dilution?

Accepted Answer

$$0.900\ \mathrm{L}$$

Question 13

Which of the following mixtures would be classified as a suspension?

Accepted Answer

Muddy water

Question 14

Which of the following is true about the separation of mixtures using a semipermeable membrane?

Accepted Answer

Solutions pass through, but colloids and suspensions do not.

Question 15

Which of the following best describes the difference between an electrolyte and a nonelectrolyte?

Accepted Answer

Electrolytes conduct electricity in solution; nonelectrolytes do not.

Question 16

A solution is prepared by mixing 50 mL of 0.10 M HCl with enough water to make 1.0 L of solution. What is the final concentration?

Accepted Answer

$$0.0050\ \mathrm{M}$$

Question 17

Which of the following is NOT a property of a solution?

Accepted Answer

Particles can be separated by a filter.

Question 18

Which of the following best explains why adding more solute to a saturated solution results in the formation of a precipitate?

Accepted Answer

The solution cannot dissolve any more solute, so the excess forms a solid.

Question 19

Which of the following is a real-life example of a colloidal dispersion?

Accepted Answer

Mayonnaise

Question 20

Which of the following best describes the effect of pressure on the solubility of a solid in a liquid?

Accepted Answer

Pressure has no significant effect on the solubility of solids in liquids.

Chapter 9: Solutions – Key Concepts and Applications

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