A rate constant is a measure of the rate of a chemical reaction. It is the constant of proportionality in the rate law for a reaction and is a function of temperature. The rate constant has units of 1/[time] and is a function of temperature. The rate constant for a given reaction is a constant that is independent of the concentrations of the reactants and products. The rate constant is a measure of the rate of a chemical reaction.
What is a rate constant?
In chemical kinetics a rate constant is a constant that describes how quickly a chemical reaction takes place.
It is usually denoted by the symbol k.
How is the rate constant related to the rate of a chemical reaction?
The rate constant is directly proportional to the rate of a chemical reaction.
What factors can affect the rate constant?
The factors that can affect the rate constant are the nature of the reactants the concentration of the reactants the temperature and the presence of a catalyst.
What is the difference between a rate constant and activation energy?
The activation energy is the minimum amount of energy that is required to start a chemical reaction while the rate constant is a constant that describes how quickly a chemical reaction takes place.
Does the rate constant have units?
The rate constant has units of reciprocal seconds or inverse seconds.
What is the rate constant for a first-order reaction?
For a first-order reaction the rate constant is equal to the inverse of the sum of the rate constants for the forward and reverse reactions.
What is the rate constant for a second-order reaction?
For a second-order reaction the rate constant is equal to the square of the rate constant for the reverse reaction divided by the rate constant for the forward reaction.
What is the rate constant for a zero-order reaction?
For a zero-order reaction the rate constant is equal to the rate of the reaction divided by the concentration of the reactant.
What is the effect of temperature on the rate constant?
The effect of temperature on the rate constant is that the rate constant increases as the temperature increases.
What is the effect of concentration on the rate constant?
The effect of concentration on the rate constant is that the rate constant increases as the concentration of the reactant increases.
What is the effect of a catalyst on the rate constant?
The effect of a catalyst on the rate constant is that the rate constant increases as the concentration of the catalyst increases.
What is the Arrhenius equation?
The Arrhenius equation is an equation that relates the rate constant of a chemical reaction to the activation energy and the temperature.
What is the relationship between the rate constant and the activation energy?
The relationship between the rate constant and the activation energy is that the rate constant increases as the activation energy decreases.
What is the relationship between the rate constant and the temperature?
The relationship between the rate constant and the temperature is that the rate constant increases as the temperature increases.
What is the relationship between the rate constant and the frequency factor?
The relationship between the rate constant and the frequency factor is that the rate constant is directly proportional to the frequency factor.
