Answer: Equilibrium constant K.
- A Activation energy
- B Rate constant k
- C Rate of reaction
- D Equilibrium constant K
Correct answer: D. Equilibrium constant K
Explanation: A catalyst lowers Ea and increases k and rate, but cannot change the equilibrium constant K.
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.