Date: Name:
/Chapter 8 Quiz/Assignment - 2012
Chapter 8
Circle the best answer for each of the following questions except 12 and 13. For 12 and 13, write your solution on the back of this page.1. What is the percent (m/v) of the solution when 14.2g of potassium chloride is dissolved in 450mL of solution? (a) 31.7 (b) 0.032 (c) 3.16 (d) 0.32
2. Calculate the mass of solute in grams of sulfuric acid in 65g of solution if the mass/mass percent is 7%. (a) 5.50 (b) 4.55 (c) 9.57 (d) 0.108
3. Milk contains 2% fat by volume. What volume in L of milk would you need to consume to obtain 10ml of fat? (a) .20 (b) .020 (c) .50 (d) 1
4. Swimming pools contain about 3.0 mg/L of chloride. Express this as value in parts per million. (a) 3.0x10-6 (b) 3.0 (c) 3.0x103 (d) 3x106
5. Which of the following factors affects the RATE of dissolving of a salt?
a) shape of container b) pressure c) temperature of solvent d) all of these
6. Which of the following increases the solubility of a gas in a liquid?
(a) adding more solute (c) increasing the temperature
(b) stirring the solution (d) increasing the pressure
(e) all of the choices
7. 9.52g of magnesium chloride are dissolved in 1.00L of solution. The concentration of chloride ions in moles per Litre is
(a) 0.200 (b) 0.100 (c) 0.0500 d) 1.00
8. The mass of solid lead(II) nitrate is required to prepare 125 mL of 0.4 mol/L solution of lead(II) nitrate is
(a) 13.5g (b) 16.6g (c) 41.4g (d) 331g
9. What mass of anhydrous sodium sulfate is required to make 1L of a 1M solution? (a) 71.02 g (b) 119.06 g (c) 126.03 g (d) 142.05 g
10. If 25.0 mL of a 3.00mol/L solution of sodium hydroxide is diluted to a volume of 500.0 mL the concentration of the resulting solution is
(a) 0.150 mol/L (b) 0.250 mol/L (c) 1.20 mol/L (d) 0.0245 mol/L
11. How much concentrated 18M sulfuric acid is needed to prepare 250 mL of a 6.0 M solution? (a) 83 mL (b) 0.0083L (c) 125 mL (d) 1.25 mL
12. To how much water should 100 mL of 18M sulfuric acid be added to prepare a 1.5 M solution?
13. What is the molarity of a solution in which 10.0g of stannic pernitrate is dissolved in 500 mL of solution?