Select the rate law that corresponds to the data shown for the following reaction: Exp. 1: [A]0 = 0.012, [B]0 = 0.035, Rate = 0.1; Exp. 2: [A]0 = 0.024, [B]0 = 0.070, Rate = 0.8; Exp. 3: [A]0 = 0.024,

Question

Select the rate law that corresponds to the data shown for the following reaction: Exp. 1: [A]0 = 0.012, [B]0 = 0.035, Rate = 0.1; Exp. 2: [A]0 = 0.024, [B]0 = 0.070, Rate = 0.8; Exp. 3: [A]0 = 0.024, [B]0 = 0.035, Rate = 0.1; Exp. 4: [A]0 = 0.012, [B]0 = 0.070, Rate = 0.8

Prashant Kotian · Accepted Answer

Correct answer: A. Comparing Exp 1 and 3: [A] doubles while [B] is constant; the rate remains 0.1. Thus, order with respect to A is 0. Comparing Exp 1 and 4: [B] doubles while [A] is constant; rate increases from 0.1 to 0.8 (8 times, i.e., 2^3). Thus, order with respect to B is 3. The rate law is rate = K [B]^3.

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