Chemistry · Chemical Kinetics

The concentration of Q in a consecutive reaction P → Q → R (with rate constants k1 and k2 respectively) is given by: [Q] = k1[P]0k2 - k1 (e-k1t - e-k2t) where [P]0 is the initial concentration of P. If the value of k2 = 25 s-1, the value of k1 that leads to the longest waiting time for Q to reach its maximum concentration is: