The rate constant for a particular zero-order reaction is 0.075 M s^-1. If the initial concentration of reactant is 0.537 M it takes ________ s for the concentration to decrease to 0.100 M.

Question

Quizplus · Accepted Answer

The rate law for a zero-order reaction is:Rate = kwhere k is the rate constant.The integrated rate law for a zero-order reaction is:[A] = -kt + [A]0where [A] is the concentration of the reactant at time t, [A]0 is the initial concentration of the reactant, and k is the rate constant.We can use this integrated rate law to calculate the time it takes for the concentration of the reactant to decrease from 0.537 M to 0.100 M.[A] = -kt + [A]00.100 M = -0.075 M s^-1 * t + 0.537 Mt = 5.8 sTherefore, the correct answer is A) 5.8 s.

The Rate Constant for a Particular Zero-Order Reaction Is 0