Question

in first order reaction, 50 minutes time is taken for the completion of 93.75% of a reaction. Half life of reaction is
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Answer 1

Answer:

12.6 minutes

Explanation:

Equation for first-order reaction rate constant,

k = $\frac{1}{t} ln\frac{a}{a-x}$, here x=93.75 %, so a-x = 100-93.75 = 6.25 %

K=0.055

Now, $t_{1/2}$ = 0.693/k = 0.693/0.055 = 12.6 min