# Solutions Homework Problem Set

This problem set was developed by S.E. Van Bramer for Chemistry 146 at Widener University.

1. 0.8687 g of Calcium Chloride is dissolved in water and diluted to a total volume of 500.0 mL.
1. What is the concentration of calcium chloride (molarity)?
2. What is the concentration of calcium (molarity)?
3. What is the concentration of chloride (molarity)?

2. 0.8687 g of Calcium Chloride is dissolved in 500.0 mL of water at 30oC.
1. What is the molality of the calcium chloride?
2. What is the concentration of calcium chloride (weight %)?
3. What is the concentration of calcium chloride (ppth)?
4. What is the concentration of calcium (ppm)?

3. What is the vapor pressure of a solution prepared when 0.8687 g of Calcium Chloride is dissolved in 5.0 mL of water at 30oC. What is the vapor pressure of this solution at 100.0 oC? What is the boiling point of this solution? What is the freezing point of this solution?

4. It is important to use an isotonic solution for an IV in the hospital. Calculate the osmotic pressure between a solution of pure water and a 0.9% (m/m) sodium chloride solution (as shown in figure 14.16 of your textbook). What effect would this pressure have on the cells in your body? Assume the density of the sodium chloride solution is 1.02 g per mL.

Please send comments or suggestions to svanbram@science.widener.edu

Scott Van Bramer
Department of Chemistry
Widener University
Chester, PA 19013