## MCAT General Chemistry Review - Alexander Stone Macnow, MD 2019-2020

# Electrochemistry

Equations to Remember

(12.1) **Moles of electrons transferred during reduction:** M*n*^{+} + *n e*^{—} → M (*s*)

(12.2) **Electrodeposition equation:**

(12.3) **Standard electromotive force of a cell:** *E*°_{cell} = *E*°_{red,cathode} − *E*°_{red,anode}

(12.4) **Standard change in free energy from standard emf:** Δ*G*° = *−n*F*E*°_{cell}

(12.5) **Nernst equation (full):**

(12.6) **Nernst equation (simplified):**

(12.7) **Reaction quotient:**

(12.8) **Standard change in free energy from equilibrium constant:** Δ*G*° = —R*T* ln *K*_{eq}

(12.9) **Free energy change (nonstandard conditions):** Δ*G* = Δ*G*° + R*T *ln *Q*