Last modified: Mon 09/16/2013 10:14:21 pm
ACA

Oklahoma State University

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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.


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Laboratory Section:

1. A solution is prepared by mixing 6.00 grams of C6H12O6 with 35.0 grams of H2O.

a) Calculate the mol of glucose that are dissolved in water.

mol C6H12O6

b) Calculate the molality (glucose) of the solution.

molal

c) Is glucose an electrolyte or a nonelectrolyte when dissolved in water?

d) Calculate the ideal freezing point of this solution. (NOTE: k f(H2O) = 1.86 °C m-1)

°C

e) Calculate the ideal boiling point of this solution. (NOTE: kb(H2O) = 0.512 °C m-1)

°C

2. A solution is prepared by mixing 3.85 grams of Ca(NO3)2 in 150. grams of H2O. Calculate the ideal freezing point and the ideal boiling point of the solution. (NOTE: k f(H2O) = 1.86 °C m-1 and kb(H2O) = 0.512 °C m-1)

°C (freezing point)

°C (boiling point)

3. Calculate the molar mass of phenol if 0.588 grams of this compound when dissolved in 25.0 g of cyclohexane, changes the freezing point of cyclohexane by 5.04 °C. (NOTE: k f(cyclohexane) = 20.2 °C m-1)

g mol-1

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

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