Kemija - 2019. ljeto, 24.

A. \(\mathrm{Pb}(\mathrm{s})+\mathrm{SO}_{4}{ }^{2-}(\mathrm{aq}) \rightarrow \mathrm{PbSO}_{4}(\mathrm{s})+2 \mathrm{~e}^{-}\)

B. \(\mathrm{PbSO}_{4}(\mathrm{s})+2 \mathrm{~e}^{-} \rightarrow \mathrm{Pb}(\mathrm{s})+\mathrm{SO}_{4}{ }^{2-}(\mathrm{aq})\)

C. \(\mathrm{PbO}_{2}(\mathrm{s})+4 \mathrm{~H}_{3}\mathrm{O}^{+}(\mathrm{aq})+\mathrm{SO}_{4}{ }^{2-}(\mathrm{aq})+2 \mathrm{~e}^{-} \rightarrow \mathrm{PbSO}_{4}(\mathrm{s})+6 \mathrm{H}_{2}\mathrm{O}(\ell)\)

D. ${\mathrm{P}\mathrm{b}\mathrm{S}\mathrm{O}}_4(\mathrm{s})+6{\mathrm{H}}_2\mathrm{O}(\mathrm{\ell })\to {\mathrm{P}\mathrm{b}\mathrm{O}}_2(\mathrm{s})+4{\mathrm{H}}_3{\mathrm{O}}^{+}(\mathrm{a}\mathrm{q})+{\mathrm{S}\mathrm{O}}_4{}^{2-}(\mathrm{a}\mathrm{q})+2{\mathrm{e}}^{-}\backslash mathrm\{PbSO\}\_\{4\}(\backslash mathrm\{s\})+6\; \backslash mathrm\{~H\}\_\{2\}\backslash mathrm\{O\}(\backslash ell)\; \backslash rightarrow\; \backslash mathrm\{PbO\}\_\{2\}(\backslash mathrm\{s\})+4\; \backslash mathrm\{~H\}\_\{3\}\backslash mathrm\{O\}^\{+\}(\backslash mathrm\{aq\})+\backslash mathrm\{SO\}\_\{4\}\{\; \}^\{2-\}(\backslash mathrm\{aq\})+2\; \backslash mathrm\{~e\}^\{-\}$