The rate law

the rate of reaction indicates the speed at which the reaction can occur. it can be expressed in terms of a change in the concentration of reactants or products per unit of time:
rate = concentration changetime change

the rate of reaction can be defined either as adecrease in the concentration of a reactant per unit of time or as an increase in the concentration of a product per unit of time.
select the image to explore the activity that shows the different ways in which the rate of a reaction can be expressed.

image for nteractive activity - the rate law the rate of reaction indicates the speed at which the reaction can occur. i

when you click on the "disappearance of reactants," "appearance of products," or "rate law expression" button, you will observe different expressions for the rate of the reaction.