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First Order Reaction

A first order...

Question

A first order reaction is 20% complete in 10 minutes . What is the rate constant of reaction ?

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Solution

$k = \frac{0.693}{24.75} = 0.028 {m i n}^{- 1}$

$t = \frac{2.303}{0.028} l o g \frac{100}{20}$

$t = 57.4 m i n$

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