The reaction A + B→C obeys the first order rate law:
R = 5.75×10^{- 3} s^{- 1} [A]. What is the half-life of this reaction when the initial concentration of A is 0.40 M ?

Question

The reaction A + B→C obeys the first order rate law: R = 5.75×10^{- 3} s^{- 1} [A]. What is the half-life of this reaction when the initial concentration of A is 0.40 M ?

Quizplus · Accepted Answer

For a first-order reaction, the half-life (t1/2) is given by the formula t1/2 = 0.693/k, where k is the rate constant. Here, k = 5.75×10^-3 s^-1. Plugging in the values, t1/2 = 0.693 / 5.75×10^-3 s^-1 = 120.52 s, which rounds to 120 s.

The Reaction a + B→C Obeys the First Order Rate