3. Which of the following operations yields the number of moles of solute? (1 point)
molarity × moles of solution
molarity × liters of solution
molarity × mass of solution
moles of solutions ÷ volume of solution
4. To 225 mL of a 0.80M solution of KI, a student adds enough water to make 1.0 L of a more
dilute KI solution. What is the molarity of the new solution?
(1 point)
180M
2.8M
0.35M
0.18M
5. Which of the following is NOT a colligative property of a solution? (1 point)
boiling point elevation
supersaturation
vapor pressure lowering
freezing point depression
6. A solute depresses the freezing point because the solute ____. (1 point)
is colder than the solvent
disrupts crystal formation of the solvent
disrupts crystal formation of the solvent
tends to sink to the bottom of the solution
has bigger molecules than the solvent
7. How many milliliters of alcohol are in 167 mL of an 85.0% (v/v) alcohol solution? (1 point)
252 mL
228 mL
145 mL
142 mL