Question

(ii) Calculate the time required for the completion of 90% of a first order reaction. (k = 0.2303 s

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Answer 1

Explanation:

For a first order reaction,

k=t2.303loga−xa

t=0.6932.303×t1/2log(100−90)100[∵k=0.693t1/2]

=0.6932.303×t1/2log10

=3.3t1/2

=3.3 times that of half-life.