<p>Chemical kinetics describes the chemical processes involved in a reaction, and these can be written mathematically using a first-order differential equation. These equations can be solved analytically, provided some initial conditions are specified. Plotting the solutions of differential equations and interpreting the system related to chemical changes is an important aspect in chemistry education. Visualization of these solutions plays a significant role in enhancing comprehension and making abstract concepts more tangible for learners. XCOS, an open-source software, can be used to solve such differential equations and plot the solutions. This open-source software solves and plots linear as well as non-linear differential equations whose analytical solution may not be available. This capability is particularly beneficial for complex chemical systems where traditional methods fall short. Various parameters intrinsic to these chemical phenomena, such as reaction rates and initial concentrations, can be altered to study their impact on the system. This dynamic approach facilitates a comprehensive exploration of the chemical processes under consideration, including reversible and biochemical reactions. An attempt has been made here to understand the rapid and steady state equilibrium using the XCOS tool. In a three-part series, this article focuses on solving differential equations relating to multi-step chemical reactions and reversible chemical reactions using XCOS.</p>