Question

The half life for a first-order reaction is 148 minutes. What is the rate constant of this reaction if the concentration is 1.10M after 50 minutes has elapsed?

Answer 1

The rate constant for the first-order reaction can be calculated by using the equation: k = 0.693 / t1/2. In this case, the half life is 148 minutes, so the rate constant is calculated as 0.0047 per minute. This means that, after 50 minutes have elapsed, the concentration of the reaction should be 1.10M * e^(-0.0047 * 50) = 0.962M.