The following reaction is second order in [A] and the rate constant is 0.039 M^-1s^-1: A → B
The concentration of A was 0.26 M at 28 s. The initial concentration of A was ________ M.

Question

The following reaction is second order in [A] and the rate constant is 0.039 M^-1s^-1: A → B The concentration of A was 0.26 M at 28 s. The initial concentration of A was ________ M.

Quizplus · Accepted Answer

Using the second-order integrated rate law: 1/[A] = kt + 1/[A]₀, we can solve for [A]₀. Given k = 0.039 M⁻¹s⁻¹, [A] = 0.26 M at t = 28 s, we find [A]₀ = 0.36 M.

The Following Reaction Is Second Order in [A] and the Rate