What is the chemical reaction that occurs during the discharging of a lead storage cell?
- A$Pb + PbO_2 + 2H_2SO_4 \rightarrow 2PbSO_4 + 2H_2O$
- B$2PbSO_4 + 2H_2O \rightarrow Pb + PbO_2 + 2H_2SO_4$
- C$Pb + PbO_2 \rightarrow 2PbO$
- D$PbSO_4 + 2H_2O \rightarrow PbO_2 + H_2SO_4$
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The Gibbs energy for the decomposition of $Al_2O_3$ at $500\,^oC$ is as follows:
$\frac{2}{3}Al_2O_3 \to \frac{4}{3}Al + O_2, \Delta_rG = +940\,kJ\,mol^{-1}$
The potential difference needed for the electrolytic reduction of aluminium oxide is ............... $V$.
$\frac{2}{3}Al_2O_3 \to \frac{4}{3}Al + O_2, \Delta_rG = +940\,kJ\,mol^{-1}$
The potential difference needed for the electrolytic reduction of aluminium oxide is ............... $V$.
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