Last modified: Wed 09/11/2013 08:08:43 pm
ACA

Oklahoma State University

It is OK to use your textbook or lecture notes from class, but if you can answers the questions without it that is OK too.

Do not press the RETURN or ENTER key while you are answering these questions. Your browser will interpret either the same as clicking on the Submit key.

Answer all of the questions below. If you do not know an answer enter CNA. However, it will help me the most if you answer each question with your best intuition/idea about what would be a reasonable answer.


First Name:

Last Name:

Laboratory Section:

1. An aqueous solution of calcium chloride, CaCl2, is 3.464 M and has a density of 1.2816 g cm-3. Assuming you have 1 liter of this solution answer the following questions.

a) Use the density to calculate the mass of the solution

grams of solution

b) Given that you have 1 liter of solution how many moles of CaCl2 are in the solution?

mol CaCl2

c) Calculate the mass of CaCl2 in the solution

grams CaCl2

d) Determine the mass of water in the solution.

grams of H2O

2. Calculate the weight percent of CaCl2 in the solution.

weight % CaCl2

3. Calculate the molality of CaCl2 in the solution.

m CaCl2

4. Calculate the mol fraction of CaCl2 in the solution.

(mol fraction CaCl2)

5. Calculate the mol fraction of Cl- ion in the solution.

(mol fraction Cl-)

6. Is there anything about the questions that you feel you do not understand? List your concerns/questions.

7. If there is one question you would like to have answered in lecture, what would that question be?