Question

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.

Answer 1

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

Step-by-step 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