Question

The standard electrode potential for $\text{Zn}^{2+}/\text{Zn}$ is $-0.76$ V and for $\text{Cu}^{2+}/\text{Cu}$ is $+0.34$ V. The EMF of the cell
$$ \text{Zn}|\text{Zn}^{2+}||\text{Cu}^{2+}|\text{Cu} $$ is:

• A. 1.10 V
• B. 0.76 V
• C. -0.42 V
• D. 0.34 V

Hint:

EMF of a galvanic cell is always cathode potential minus anode potential. The more positive E° value is usually the cathode.