In case of first-order kinetics of the reaction \[\text{A}\longrightarrow \text{B}\] we can solve the differential equation, which describes the concentration-time profile of the substance A, for several parameter values (initial concentrations and reaction rate constant \(k\)), and we can compute and plot solution curves.

In the interactive computer version below, the chemical reaction is simulated and the graphs of the concentrations \([\text{A}]\) and \([\text{B}]\) of substance A and B are plotted. You can vary the initial concentrations and the reaction rate constant in order to explore what the effect of such action is. So you can find out, for example, that a smaller rate constant only leads to a slower conversion.