Answer: Is independent of initial concentration.
- A Depends on initial concentration
- B Is independent of initial concentration
- C Doubles with time
- D Decreases over time
Correct answer: B. Is independent of initial concentration
Explanation: For first-order reactions, t½ = 0.693/k, which is constant and independent of concentration.
First-order decay curve: concentration halves every t½, and that half-life is constant - a defining test for first-order kinetics.
Concept context
Study the speed of reactions and what affects it: concentration, temperature, and catalysts. Covers rate law, order of reaction, the Arrhenius equation, and reaction mechanisms step by step.