If all the solute is dissolved in diagram 1, how would heating or cooling the solution cause each of the following changes?
a. 2 to 3
<IMAGE>

State whether each of the following refers to a saturated or an unsaturated solution:

c. A uric acid concentration of 4.6 mg/100 mL in the kidney does not cause gout.

State whether each of the following refers to a saturated or an unsaturated solution:

a. A crystal added to a solution does not change in size.

Explain the following observations:

a. More sugar dissolves in hot tea than in iced tea.

Use the following graph for problems 1.55 and 1.56:

<IMAGE>

d. Does the solubility of carbon dioxide increase or decrease with an increase in temperature?

Potassium nitrate has a solubility of 32 g of KNO₃ in 100. g of H₂O at 20 °C. Determine if each of the following forms an unsaturated or saturated solution at 20 °C:

a. adding 32 g of KNO₃ to 200. g of H₂O

In general, as the temperature increases, the solubility of gas in a given liquid ________________, and the solubility of most solids in a given liquid ________________. 

a. Increases, increases

b. increases, decreases

c. decreases, increases

d. decreases, decreases

A solution is prepared by dissolving 12.5 g of KBr in 20 mL of water at 60 °C (see Figure 9.3). Is this solution saturated, unsaturated, or supersaturated? What will happen if the solution is cooled to 10 °C?

<IMAGE>

State whether each of the following refers to a saturated or an unsaturated solution:

c. A uric acid concentration of 4.6 mg/100 mL in the kidney does not cause gout.