You and your lab partner are studying the rate of a reaction, A + B --> C. You m

Question

You and your lab partner are studying the rate of a reaction, A + B --> C. You make measurements of the initial rate under the following conditions:

For a reaction of the form, A + B + C --> Products, the following observations are made: tripling the concentration of A increases the rate by a factor of 9, doubling the concentration of B has no effect on the rate, and tripling the concentration of C increases the rate by a factor of 9.

By what factor will the rate of the reaction described in part (b) above change if the concentrations of A, B, and C are all halved (reduced by a factor of 2)?

Explanation / Answer

rate = k [A]2[B]0[C]2

if A B C are halved, i.e. [A/2][B/2][C/2]

rate will be = k [A]2[B]0[C]2  / 4*1*4

the rate will be cut off (decreased) by a factor of 16

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