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In the standard Daniell cell (Zn|Zn²⁺ || Cu²⁺|Cu) at unit concentrations, the cell EMF is:

A1.86 V
B0.34 V
C−0.76 V
D1.10 V
Answer & Solution
Correct answer: D. 1.10 V
E°cell = E°(cathode) − E°(anode) = E°(Cu²⁺/Cu) − E°(Zn²⁺/Zn) = 0.34 − (−0.76) = **+1.10 V**.
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