Q. 83.6( 44 Votes )

In a pseudo first

Answer :

(i) Average rate of reaction over interval is [change in concentration]/[time taken] i.e.

(ii) the pseudo first-order rate constant can be calculated by

K = (2.303/t) log(Ci/Ct) where K is Rate constant,

t is time taken,

Ci is initial concentration

Ct is Concentration at time t.

K = (2.303/30) log (0.55/0.31)

K = 1.9 × 10-2 sec-1

(i) Average rate between 30 to 60 sec is 0.00467 mol L-1sec-1

(ii) Pseudo first order rate constant is 1. × 10-2sec-1

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