Galvanic Cell question

[G1SG2]

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.Which of the following combinations of reactants can be used in a galvanic cell?

I. Zinc cation and copper metal
II. Aluminum metal and nickel cation
III. Silver cation and chromium metal.

.A. ..I only .
.B. ..I and II only .
.C. ..II and III only .
.D. ..I, II, and III .

I seem to be misunderstanding something in the explanation. The answer is C. For choice I, it says: The reduction of zinc cation requires 0.76 volts, while the oxidation of copper requires 0.34 volts. The result is that option I has an overall E˚ of -1.10 volts, so option I is eliminated.

Wouldn't copper be reduced and zinc be oxidized, since the former has a higher reduction potential? What am I missing? Thanks.

 

[Don Draper]

.Which of the following combinations of reactants can be used in a galvanic cell?

I. Zinc cation and copper metal
II. Aluminum metal and nickel cation
III. Silver cation and chromium metal.

.A. ..I only .
.B. ..I and II only .
.C. ..II and III only .
.D. ..I, II, and III .

I seem to be misunderstanding something in the explanation. The answer is C. For choice I, it says: The reduction of zinc cation requires 0.76 volts, while the oxidation of copper requires 0.34 volts. The result is that option I has an overall E˚ of -1.10 volts, so option I is eliminated.

Wouldn't copper be reduced and zinc be oxidated, since the former has a higher reduction potential? What am I missing? Thanks.

So the question says Zinc CATION and Copper METAL, in other words, Zn 2+ and Copper (s). As you can see in your reduction potentials, Zn2+ is -0.76. You can't flip this because it says Zinc CATION.

If it said Zinc METAL and copper CATION, now were talking.

I think I made the same mistake by going to fast when I took this.

 

[G1SG2]

So the question says Zinc CATION and Copper METAL, in other words, Zn 2+ and Copper (s). As you can see in your reduction potentials, Zn2+ is -0.76. You can't flip this because it says Zinc CATION.

If it said Zinc METAL and copper CATION, now were talking.

I think I made the same mistake by going to fast when I took this.

OMG lol total "learn to read" question for me. I totally sped through it. Thanks!