At a given temperature,a first-order reaction has a rate constant of 2.5 × 10^-3 s^-1.How long will it take for the reaction to be 35% complete?

Question

Quizplus · Accepted Answer

For a first-order reaction, the time taken for a certain percentage completion can be calculated using the formula: t = (1/k) * ln(1/(1-fraction completed)). Here, k = 2.5 × 10^-3 s^-1 and fraction completed = 0.35. Plugging in these values gives t ≈ 170 s.

At a Given Temperature,a First-Order Reaction Has a Rate Constant