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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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Cisplatin reacts with water according to the equation

PtCl2(NH3)2(aq) + H2O(l) ---> PtCl(H2O)(NH3)2+(aq) + Cl-(aq)

The rate of the reaction of cisplatin with water was studied and the following data was obtained.




Initial Rate (M min-1)




2.19 x 10-5




3.65 x 10-5




1.17 x 10-4

Answer the following questions.


1. Compare Experiment 1 and 2. By what factor did the [PtCl2(NH3)2] increase?

2. Compare Experiment 1 and 2. By what factor did the initial rate increase?

3. Compare the ratio of the [PtCl2(NH3)2] in Exp 1 and 2 to the ratio of the Initial rate for Exp 1 and 2. What is the order of the reaction with respect to [PtCl2(NH3)2]? (NOTE: If you are not sure what order is say so.)

4. What is the rate law for this reaction (assume H2O does not appear in the rate law equation.) (NOTE: If you are not sure what a rate law is say so.)

5. Calculate the magnitude and the units for the rate constant. (NOTE: If you are not sure what a rate constant is say so.)

magnitude =

units are

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?