Rate Constant - A Level Chemistry Definition

What is the rate constant?

In A Level Chemistry, the term 'rate constant' refers to the proportionality factor in the rate equation that links the rate of a chemical reaction to the concentrations of the reactants involved. Denoted by the symbol 'k', the rate constant is specific to a particular reaction at a given temperature and provides insights into the reaction's speed. It remains constant for a reaction under constant conditions, although it typically increases with temperature due to the added energy facilitating more frequent and effective particle collisions. The units of the rate constant vary depending on the order of the reaction, playing a crucial role in determining the reaction rate using the rate equation.

Rate Constant Revision Resources to Ace Your Exams

For more information about the rate constant check out the following resources:

• Rate Constant Revision Notes

• Rate Constant Exam Questions

Explore our A level Chemistry Revision Resources.