The rate constant of a reaction is 0.05 min^(-1). What is the time required for 90% completion?
Q1. The rate constant of a reaction is 0.05 min^(-1). What is the time required for 90% completion?
Answer: 46.04 min
Explanation: For a first-order reaction, t = ln([A]0/[A])/k = ln(10)/0.05 = 46.04 min.