What is the concentration of 'B' after 25 min? — Chemical Kinetics Chemistry Question

💡 Solution & Explanation

Since K1 : K2 = 1 : 2 and K1 = 0.04 min^-1 => K2 = 0.08 min^-1. [B] = [A]0 x [K1 / (K2 - K1)] x (e^(-K1 t) - e^(-K2 t)) = 1.0 x (0.04 / 0.04) x (e^-1 - e^-2) = 0.368 - 0.135 = 0.233 M (printed in key as 0.29 M).