What do you understand by instantaneous rate of a reaction?

The instantaneous rate of a chemical reaction is the rate at a particular moment during the course of the reaction. It is determined by measuring the rate of change of reactant or product concentrations at an infinitesimally small time interval. Mathematically, the instantaneous rate is found using calculus as the derivative of the concentration with respect to time. By examining the instantaneous rate at different points in time, scientists gain insights into the dynamic behavior of the reaction, revealing changes in reaction rates as the reaction progresses. This approach helps to understand reaction mechanisms and kinetics at various stages.