Answer: Temperature.
- A Concentration of reactants
- B Pressure of the products
- C Temperature
- D Volume of the vessel
Correct answer: C. Temperature
Explanation: The rate constant k depends on temperature (through the Arrhenius equation) and on the catalyst, but not on the concentrations of reactants.
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.