The Nernst equation is a mathematical equation used in electrochemistry to calculate the potential difference between an electrode and a solution. Synonyms for the Nernst equation include the Nernst-Distribution Law, the Nernst-Planck Equation, and the Nernstian Equation. The Nernst equation is essential to understanding the behavior of electrochemical systems and has significant applications in fields such as analytical chemistry, biochemistry, and materials science. It is also crucial in the study of biological processes, such as nerve and muscle function. The Nernst equation is named after the German physical chemist Walther Nernst, who derived the formula in 1889.