Sponsor Area

Chemical Kinetics

Question

(a) For a reaction A + B --> P, the rate law is given by,

r = k [A]^1/2 [B]².

What is the order of this reaction?

(b) A first order reaction is found to have a rate constant k = 5·5 x 10^-14 s^-1. Find the half-life of the reaction.

Solution

(a)

For A + B--> P

r = k [A]^1/2 [B]²

The order of the reaction = $2 plus 1 half space equals 5 over 2 space equals 2.5$

(b) For first order reaction

k = 5.5 x 10^-14 s^-1

Half-life period ( $straight t subscript bevelled 1 half end subscript$ ) for the first order reaction

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