At 25°C the rate constant for the first-order decomposition of a pesticide solution is 6.40 × 10^-3 min^-1.If the starting concentration of pesticide is 0.0314 M, what concentration will remain after 62.0 min at 25°C?

Question

Quizplus · Accepted Answer

For a first-order reaction, the concentration at time t can be calculated using the formula: [A] = [A]₀ * e^(-kt). Substituting the given values: [A] = 0.0314 * e^(-6.40 × 10^-3 * 62.0) = 2.11 × 10^-2 M.

At 25°C the Rate Constant for the First-Order Decomposition of a Pesticide