If a reaction is first order with a rate constant of 0.0450 s⁻¹, how much time is required for 65% of the initial quantity of reactant to be consumed?

Answer 1

1st order kinetics is C/C₀ = e^-kt with r = kC

You can solve for time by isolating t:

t = -(1/k)ln(C/C₀)

You can plug in k and C/C₀ = .65

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