Practice question
Question
A first-order reaction has an initial concentration of 0.8 mol L⁻¹. After 30 minutes, the concentration reduces to 0.4 mol L⁻¹. What is the rate constant?
Explanation
k = (2.303/30) log(0.8/0.4) = (2.303×0.301)/30 ≈ 0.0231 min⁻¹.
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