Reaction condition

Chemists therefore investigate how reaction conditions—such as temperature, concentration, gas pressure or the surface area of a solid—affect reaction rate.

Chemists can change a reaction condition, such as the concentration of a reactant, and measure how quickly the reaction happens. On a graph of reaction condition versus rate, the condition changed goes on the horizontal axis and the measured rate goes on the vertical axis. Rate means the amount of reactant used up or product made per unit time.