A rate constant is
A) the rate of a reaction at standard temperature and pressure.
B) the rate of a reaction at equilibrium.
C) a proportionality constant relating the rate of a reaction to the concentration(s) of the reactant(s).
D) a kind of transition state.

Question

Quizplus · Accepted Answer

A rate constant is a proportionality constant in the rate law of a chemical reaction, relating the rate of the reaction to the concentrations of the reactants. It is not dependent on conditions such as standard temperature and pressure, does not specifically pertain to the rate at equilibrium (since at equilibrium the rate of the forward reaction equals the rate of the reverse reaction), and is not a type of transition state.

A Rate Constant Is