Review Solution

True or false

1. Whipping cream is an example of a solution.

False, it is a colloid

2. Solutions show the tyndall effect.

False, colloids do.

3. Suspensions settle out with time.

True.

4. Electrolytes can carry an electric current.

True.

Molarity5. A solution has a volume of 250. mL and

contains 0.70 mol of NaCl. What is the molarity of the solution? 2.8 M

6. How many grams of glucose, C6H12O6, is needed to prepare 275 mL of a 1.5M glucose solution?

74.3 g

Percent Solutions7. If 10. mL of acetone is diluted with water to

a total solution volume of 200. mL, what is the percent volume (v/v) of acetone in the solution?

5.0%

8. How many grams of NaCl would you need to prepare 1500g of a 5.0% NaCl (m/m) solution?

75g

Dilutions9. How many mL of a 4.00M KI solution are

needed to prepare 250.0mL of a 0.760 M KI solution?

47.5 mL

10. How many mL of a 2.00M NaCl solution must be diluted with water to prepare 100.0 mL of a 0.400 M NaCl solution?

20.0 mL

Molality 11. How many grams of KI must be dissolved

in 500.0g of water to produce a 0.060 m KI solution?

5.0g KI

12.Calculate the molality of a solution prepared by dissolving 10.0g NaCl in 600g of water.

0.285 m NaCl

Mole fraction 11. What are the mole fractions of glucose in

water if a solution is made with 7.59 g glucose, C6H12O6 , dissolved in 125 g water?

Xglucose= 0.00605Xwater = 0.994