Final answer:
The Nernst equation is used to predict the membrane potential for each ion in biology.
Step-by-step explanation:
The Nernst equation is used to predict the membrane potential for each ion. It is an equation that relates the concentration gradient of an ion and its electrical potential across a membrane. The equation is:
E = (RT/zF) * ln([X]out/[X]in)
Where E is the membrane potential, R is the gas constant, T is the temperature, z is the charge of the ion, F is Faraday's constant, [X]out is the concentration of the ion outside the cell, and [X]in is the concentration of the ion inside the cell.