Given the following two standard reduction potentials,
M³⁺ + 3e⁻ ⟶ M & E⁰ = -0.10 V
M²⁺ + 2e⁻ ⟶ M & E⁰ =-0.50 V
Solve for the standard reduction potential of the half-reaction
M³⁺ + e⁻ ⟶ M²⁺