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Standard reduction potentials for nickel(II) and copper(II) The standard reduction potential for a substance indicates how readily that substance gains electrons relative to other substances at standard conditions. Consider the following:
Ni2+(aq)+2e- -> Ni(s), E red = -0.23V Cu2+(aq)+2e- -> Cu(s), E red = +0.337V
What is the standard potential, E cell, for this galvanic cell? Express your answer to four significant figures and include the appropriate units.

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Answer:

The standard potential, E cell, for this galvanic cell is 0.5670V

Explanation:

Ni²⁺(aq)  +  2e⁻   →   Ni(s)           E red =  - 0.23V      ANODE

Cu²⁺(aq) +  2e-    →  Cu(s)          E red = + 0.337V    CATHODE

ΔE° = E cathode - E anode

ΔE° = 0.337V - (0.23V) = 0.5670 V

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