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Question 9 of 10
What are the half-reactions for a galvanic cell with Zn and Ni electrodes?
A. Zn2+(aq) + 2e → Zn(s) and Ni2+(aq) + 2e → Ni(s)
B. Zn2+(aq) + 2e → Zn(s) and Ni(s) + Ni2+(aq) + 2e
C. Zn(s) → Zn2+(aq) + 2e and Ni(s) → Ni2+(aq) + 2e
O D. Zn(s) → Zn2+(aq) + 2e and Ni2+(aq) + 2e → Ni(s)
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Answer 1

Answer:

D. Zn(s) → Zn2+(aq) + 2e and Ni2+(aq) + 2e → Ni(s)

Explanation:

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Answer 2

Option  D. Zn(s) → Zn2+(aq) + 2e and Ni2+(aq) + 2e → Ni(s)

What are half-reactions for a galvanic cell with Zn and Mg electrodes?

The emf of a half-cell, with respect to the standard hydrogen electrode, is called the reduction potential. The emf for the Mg-Zn cell described would be: E=Eo(red) (Zn) - Eo(red) (Mg) = -0.76 - (-2.38) = 1.62V if the solutions are 1.0 M.

What are the half-reactions of a galvanic cell?

A half-cell reaction is either an oxidation reaction in which electrons are lost or a reduction reaction in which electrons are gained. The reactions occur in an electrochemical cell in which the electrons are lost at the anode through oxidation and consumed at the cathode where the reduction occurs.

Learn more about Zn and Ni electrodes at

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