The following data were obtained for the hypothetical reaction 2A + B ? products

Question

The following data were obtained for the hypothetical reaction 2A + B ? products. [A]0 (M) [B]0 (M) Initial Rate (M/s) 0.2 0.1 5 0.2 0.2 20 0.6 0.1 15 What is the overall order of this reaction? Answer 0 1/2 1 4 3 The following data were obtained for the hypothetical reaction 2A + B ? products. [A]0 (M) [B]0 (M) Initial Rate (M/s) 0.2 0.1 5 0.2 0.2 20 0.6 0.1 15 What is the overall order of this reaction? The following data were obtained for the hypothetical reaction 2A + B ? products. [A]0 (M) [B]0 (M) Initial Rate (M/s) 0.2 0.1 5 0.2 0.2 20 0.6 0.1 15 What is the overall order of this reaction? The following data were obtained for the hypothetical reaction 2A + B ? products. 0.2 0.1 5 0.2 0.2 20 0.6 0.1 15 What is the overall order of this reaction? 0 1/2 1 4 3 [A]0 (M) [B]0 (M) Initial Rate (M/s) 0.2 0.1 5 0.2 0.2 20 0.6 0.1 15

Explanation / Answer

rate = K [A]^m[B]^n

if we do rate1/rate3 =

rate1/rate3 = [A1]^m[B1]^n/ [A3]^m[B3]^n

5/15 = [0.2/0.6]^m

1/3 = (1/3)^m

order w.r.t. A is 1

if we do rate1/rate2 =

rate1/rate2= [A1]^m[B1]^n/ [A2]^m[B2]^n

5/20 = [0.1/0.2]^n

1/4 = (1/2)^n

(1/2)^2 = (1/2)^n

order w.r.t. B is 2

overall order of reaction is 3

rate of the raection is rate = K3 [A]^1[B]^2

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