Problem: 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 (V) for the Cu2+/Cu half-­cell is +0.34 V, what is the standard reduction potential for the Ga3+/Ga half­-cell? a. +1.24 Vb. -1.24 Vc. -0.56 Vd. +0.56 Ve. +1.64 V

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We're being asked to determine the standard reduction potential of Ga3+/Ga half­-cell when the cell potential is 0.90 V and the half-­cell potential of Cu2+/Cu is +0.34 V.

3 Cu2+(aq) + 2 Ga(s) ⇌ 3 Cu(s) + 2 Ga3+(aq)

To determine the standard cell potential of the other half-cell reaction, we must identify which reaction is present in the anode and cathode

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Problem Details

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 (V) for the Cu2+/Cu half-­cell is +0.34 V, what is the standard reduction potential for the Ga3+/Ga half­-cell? 

a. +1.24 V

b. -1.24 V

c. -0.56 V

d. +0.56 V

e. +1.64 V

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