Homework Assignment 8

C.2 #1-3 p. 56

1. 

• a. 108 g
• b. 45 g

2. 

• a. 10 g
• b. 20 g

3. 

• a. 87.5 g will precipitate
• b. 80 g

ISCS #1-8 p. 82

1. Three teaspoons of sugar will dissolve in hot tea, but not equally in iced tea because the differences in temperatures can affect the solubility.

2. 47 g

3. Solubility of sugar

• a. 200 g
• b. 710 g
• c. 1892 g

4. Most to least soluble

• a. 20 degrees C: NaCl, KCl, KNO3
• b. 80 degrees C: KNO3, KCl, NaCl

5. The term saturated means a solution in which the solvent has dissolved as much solute as it can retain at a specific temperature. The term unsaturated means a solution containing a lower concentration of solute than a saturated solution contains at a specific temperature.

6. Solubility of potassium nitrate

• a. 35 g
• b. saturated
• c. 90 g

7. 

• a. Unsaturated: the crystal will dissolve.
• b. Saturated: the crystal will form at the bottom.
• c. Supersaturated: the crystal will add to the precipitate at the bottom.

8. 40% ethanol