We’re being asked to determine the standard cell potential (E°cell) for the cell represented by the combination of the following half-reactions:
2 Hg2+(aq) + 2 e– ⇌ Hg22+(aq) E° = 0.92 V
Cr3+ (aq) + 3 e– ⇌ Cr(s) E°= –0.74 V
To calculate for the standard cell potential, use the following equation:
We can determine the anode and cathode by comparing their E° values.
What is the E°cell for the cell represented by the combination of the following half-reactions?
2Hg2+(aq) + 2e– ⇌ Hg22+(aq) E° = 0.92 V
Cr3+ (aq) + 3e– ⇌ Cr(s) E° = –0.74 V
A) –0.18 V
B) 0.18 V
C) 1.28 V
D) 1.66 V
E) 2.12 V
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