24) For a reaction that follows the general rate law, Rate = k[A][B]2, what will

Question

24) For a reaction that follows the general rate law, Rate = k[A][B]2, what will happen to the rate of reaction if the concentration of B is increased by a factor of 2.00? The rate will A) increase by a factor of 4.00 C) decrease by a factor of 1/4.00 B) increase by a factor of 2.00 D) decrease by a factor of 1/2.00. 25) The data below were collected for the following reaction: 2 NO2 (g) (g) 2 NO2F (g) Expt INO2l (M) F2l (M) Initial Rate (Ms1) 0.100 0.100 0.200 0.100 0.200 0.200 0.028 0.056 0.112 What is the expression for the rate law of the reaction? A) Rate- kINO2lF2l C) Rate = k[NO2] B) Rate KINO212(F2l D) Rate kNO21IF212

Explanation / Answer

Ans 24 : C) decrease by a factor of 1/4.00

The rate law is given as : rate = k[A][B]2

when the concentration is decreased of B , the new rate :

rate' = k[A][B/2]2

rate' = rate / 4

So the new rate has decreased by the factor of 4.

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