Question 1

According to Henry's Law, the solubility of a dissolved gas in a liquid is ______ proportional to the partial pressure of that gas over the liquid.

Accepted Answer

directly

Question 2

Which equation correctly represents Henry's Law for the solubility of a gas?

Accepted Answer

$$C = k_H 	imes P_{gas}$$

Question 3

If the partial pressure of oxygen above water is doubled, what happens to the solubility of oxygen in the water?

Accepted Answer

It is doubled.

Question 4

Which of the following best describes the effect of temperature on the solubility of gases in liquids?

Accepted Answer

As temperature increases, gas solubility decreases.

Question 5

A sealed soda bottle is opened at room temperature. Which statement best explains why bubbles form?

Accepted Answer

The pressure above the liquid decreases, causing dissolved CO$$_2 to $$escape.

Question 6

Which of the following is true for the solubility of NaCl (s) and CH$$_4 (g) in $$water?

Accepted Answer

Question 7

If the solubility of a gas in water at 1 atm is 0.03 mol/L, what will its solubility be at 3 atm, assuming temperature is constant?

Accepted Answer

0.09 mol/L

Question 8

Which of the following statements is correct regarding the solubility of solids and gases in water as temperature increases?

Accepted Answer

Solubility of solids increases, solubility of gases decreases.

Question 9

A diver breathes compressed air at a depth where the pressure is 4 atm. If the solubility of nitrogen in blood at 1 atm is 0.02 mol/L, what is the solubility at 4 atm?

Accepted Answer

0.08 mol/L

Question 10

Which of the following best explains why fish are more likely to suffocate in warm water than in cold water?

Accepted Answer

Warm water holds less dissolved oxygen due to decreased gas solubility.

Question 11

Which of the following is NOT a factor that affects the solubility of a gas in a liquid?

Accepted Answer

Volume of the liquid

Question 12

A patient is given oxygen therapy at 2 atm. If the Henry's Law constant $$k_H$$ for O$$_2 in $$blood is $$1.3 	imes 10$$^{-3}$$ mol/L·atm, what is the concentration of dissolved O_2$?

Accepted Answer

$$2.6 	imes 10$$^{-3}$$ mol/L

Question 13

Which scenario would result in the greatest amount of gas dissolved in a liquid?

Accepted Answer

High pressure, low temperature

Question 14

If the temperature of a solution is increased, what happens to the solubility of most solid solutes?

Accepted Answer

It increases.

Question 15

Which of the following best describes the relationship between pressure and the solubility of solids in liquids?

Accepted Answer

Pressure has little effect on solubility.

Question 16

A can of soda is stored in a refrigerator and then left open at room temperature. Which combination of changes will most rapidly decrease the amount of dissolved CO$$_2$$?

Accepted Answer

Decrease pressure and increase temperature

Question 17

Which of the following is a correct application of Henry's Law in medicine?

Accepted Answer

Increasing the pressure of oxygen in a hyperbaric chamber increases the amount dissolved in blood.

Question 18

Which of the following is the best explanation for why deep-sea divers must ascend slowly to avoid decompression sickness?

Accepted Answer

Rapid decrease in pressure causes dissolved gases to come out of solution too quickly.

Gas Solubility and Henry's Law: Pressure and Temperature Effects

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