(Use the spaces provided for the answers and additional paper if necessary) 1. W

Question

(Use the spaces provided for the answers and additional paper if necessary) 1. When you calculated k in the rate equation for the reaction of KMnO, solution and H2C204 solution, you assumed k had the same value under the conditions of determinations 1, 2, and 3. (a) What assumption did you make about the reaction of KMnO, solution and H,C,04 solution in those determinations that allowed you to consider k to be a constant? (b) Would it be sound practice to compare the results of determinations 4-6 when calculating k? Briefly explain. rding the effect on the reaction rate of

Explanation / Answer

The rate constant depends on the temperature according to this equation also calle arrhenius equation.

k = A*exp(-Ea/RT)

A is a constant

-Ea is the activation energy which is a constant number

R is gas constant

T is temperature

So the assumption that you have to make in order to find k experimentally by changing the concentration of the solutions is that the solutions are always at the same temperature (The temperature from the lab is constant)

B) Yes It may be practical as long as the temperature remains constant

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