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How do you find the standard reduction potential for a half reaction when you are given two other half reactions of the same element but with different charges? The question expects you to use the "extensive property of ?G).
M^3+ + 3e- ---> M E0 = -0.10V
M^2+ + 2e- ---> M E0 = -0.50V
Using those two standard reduction potentials, solve for the standard reduction potential of the half reaction
M^3+ + e- ---> M^2+
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