Nernst Equation

$$ \text{Equalibrium of Ion "Z"} = E_Z = \frac{\frac{8.314\ Joules}{1\ Kelvin \cdot mol} * (37\ ^{\circ}C + 273.15) ^{\circ}K}{\text{Charge of Ion (Z)} * \frac{96,485\ Joules}{Volts \cdot mol}}* ln\left(\frac{[Z]_{outside} (Molar)}{[Z]_{inside} (Molar)}\right) $$