Why does the rate of the reaction decrease over time?

Question

Quizplus · Accepted Answer

As the reaction proceeds, the concentration of the reactants decreases, resulting in fewer successful collisions between reactant molecules. This reduces the likelihood of the reaction occurring, causing the rate of the reaction to decrease over time. Factors such as temperature, pressure, and catalysts can also affect the rate of the reaction, but in general, the decrease in reactant concentration is the primary reason for the decrease in reaction rate.

Why Does the Rate of the Reaction Decrease Over Time