Name ________________________________________________________ Period________________

The point of saturation is on the curve. Any point below the curve is an unsaturated solution.

1. How does an increase in the temperature affect the solubility of NaCl? __________

2. How does an increase in temperature affect the solubility of KBr?______________

3. At what temperature does KNO3, have the same solubility of NaCl? ____________

4. At about what temperature will 100 g of water dissolve equal amounts of KNO3 and KBr_________

5. Compared to KBr, approximately how many more grams of KNO3 would dissolve at 90°C? __________

6. If 100 g KBr are dissolved in 100 g of water at 60°C, is the solution formed saturated or unsaturated? _________________________________

7. If 32 g of NaClO3 are dissolved in 100 g of water at 30°C, is the solution produced saturated or unsaturated? ______________________________________

8. How many grams of KBr are needed to make a saturated solution in 100g of water at 30oC?__________

9. If 10g of NaCl were placed in 100 g of water at 0oC, what kind of solution would be formed?___________________________________________

10.Which is more soluble in water, KBr or NaClO3?________________________

Name ________________________________________________________ Period________________

Base your answers to questions 35 and 36 on the graph below, which shows the solubility (amount that will dissolve in 100 grams of water) of three sub- stances at various water temperatures.

35  Which statement is a correct interpretation of the data in the graph?

(1)  As water temperature increases, solubility decreases.

(2)  As water temperature increases, solubility increases.

(3)  As water temperature increases, solubility increases and then decreases.

(4)  As water temperature increases, solubility decreases and then increases.

36  As the water temperature is increased from 30°C to 70°C, how many more grams of substance A will dissolve in 100 grams of water?

(1) 20g (2) 50g (3) 40g (4) 90g

Name ________________________________________________________ Period________________

1. The jar in the diagram has been shaken and allowed to sit for a day. What can you infer about the concentration of the solution? Explain. (hint: the solution is a suspension and no more salt can dissolve into this solution.)

2. What happens to the particles of a solute (sugar) when the solute is dissolved in a solvent (water)?

3. The rate of solubility can increase due to three different factors?

4. Describe the changes that would take place to the materials in the jar if the jar were to be cooled.

5. What would happen if the jar were heated instead?

6. In what two ways is adding antifreeze to the water in a car radiator useful?