Kelvi

The rate constant for a first-order reaction is $4.606 \times 10^{-3}$ s $^{-1}.$ The time required to reduce $2.0$ g of the reactant to $0.2$ g is:

medium

ChemicalKinetics

2020

chemistry

$200$ s

$500$ s

$1000$ s

$100$ s

Explanation

To solve this problem, we need to use the formula for a first-order reaction: $\newline t = \frac{2.303}{k} \log \left(\frac{[A]_0}{[A]}\right) \newline$

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The rate constant for a first-order reaction is 4.606×10−3 4.606 \times 10^{-3} 4.606×10−3 s−1.^{-1}. −1. The time required to reduce 2.0 2.0 2.0 g of the reactant to 0.2 0.2 0.2 g is:

Explanation

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The rate constant for a first-order reaction is $4.606 \times 10^{-3}$ s $^{-1}.$ The time required to reduce $2.0$ g of the reactant to $0.2$ g is: