A galvanic cell consists of a Mg2+/Mg half-cell and a standard hydrogen electrod
ID: 1024061 • Letter: A
Question
A galvanic cell consists of a Mg2+/Mg half-cell and a standard hydrogen electrode. If the Mg2+/Mg half-cell standard cell functions as the anode, and the standard cell potential is 2.37 V, what is the standard reduction potential for the Mg2+/Mg half-cell? A galvanic cell consists of a Mg2+/Mg half-cell and a standard hydrogen electrode. If the Mg2+/Mg half-cell standard cell functions as the anode, and the standard cell potential is 2.37 V, what is the standard reduction potential for the Mg2+/Mg half-cell? -2.37 V -1.18 V +2.37 V +1.18 V
Explanation / Answer
A galvanic cell consists of a Mg2+/Mg half-cell and a standard hydrogen electrode.
for Mg2+/Mg half-cell , E0cell = 2.37 V
and
for a standard hydrogen electrode, E0cell = 0.0 V
therefore
EoCell = EoCathode EoAnode
= 0.0 V - 2.37 V
= - 2.37 V
the standard reduction potential for the Mg2+/Mg half-cell is - 2.37 V
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