Chemistry - Electrochemistry Question with Solution | TestHub

The given cell representation is $\text{Al}|{\text{Al}}^{3+}||{\text{H}}^{+}|{\text{H}}_2,\text{Pt}$.

The anode is the aluminum electrode and the cathode is the Standard Hydrogen Electrode (SHE).

The standard reduction potential of the cathode is ${\text{E}}_{{\text{H}}^{+}|{\text{H}}_2}^{\circ }=0.00\text{ V}$.

The standard reduction potential of the anode is ${\text{E}}_{{\text{Al}}^{3+}|\text{Al}}^{\circ }=-1.66\text{ V}$.

The standard cell potential is given by:

${\text{E}}_{\text{cell}}^{\circ }={\text{E}}_{\text{cathode}}^{\circ }-{\text{E}}_{\text{anode}}^{\circ }$

${\text{E}}_{\text{cell}}^{\circ }=0.00\text{ V}-(-1.66\text{ V})$

${\text{E}}_{\text{cell}}^{\circ }=1.66\text{ V}$

Answer: 1.66 V