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Multiple Choice
The standard potential for the following galvanic cell is +0.90 V: 3 Cu²⁺(aq) + 2 Ga(s) → 3 Cu(s) + 2 Ga³⁺(aq). Given that the standard reduction potential for the Cu²⁺/Cu half-cell is +0.34 V, what is the standard reduction potential for the Ga³⁺/Ga half-cell?
Recognize that the standard cell potential (E°cell) is given as +0.90 V.
Note that the standard reduction potential for the Cu²⁺/Cu half-cell is +0.34 V.
Use the formula for the standard cell potential: E°cell = E°cathode - E°anode. Here, the Cu²⁺/Cu half-cell is the cathode, and the Ga³⁺/Ga half-cell is the anode.
Rearrange the formula to solve for the standard reduction potential of the Ga³⁺/Ga half-cell: E°anode = E°cathode - E°cell. Substitute the known values to find E°anode.