Kemija - 2022./23. probna - 35.

A. $\mathrm{P}\mathrm{b}(\mathrm{s})+{\mathrm{S}\mathrm{O}}_4{}^{2-}(\mathrm{a}\mathrm{q})\to {\mathrm{P}\mathrm{b}\mathrm{S}\mathrm{O}}_4(\mathrm{s})+2{\mathrm{e}}^{-}\backslash mathrm\{Pb\}(\backslash mathrm\{s\})+\backslash mathrm\{SO\}\_\{4\}\{\; \}^\{2-\}(\backslash mathrm\{aq\})\; \backslash rightarrow\; \backslash mathrm\{PbSO\}\_\{4\}(\backslash mathrm\{s\})+2\; \backslash mathrm\{~e\}^\{-\}$

B. ${\mathrm{P}\mathrm{b}\mathrm{S}\mathrm{O}}_4(\mathrm{s})+2{\mathrm{e}}^{-}\to \mathrm{P}\mathrm{b}(\mathrm{s})+{\mathrm{S}\mathrm{O}}_4{}^{2-}(\mathrm{a}\mathrm{q})\backslash mathrm\{PbSO\}\_\{4\}(\backslash mathrm\{s\})+2\; \backslash mathrm\{~e\}^\{-\}\; \backslash rightarrow\; \backslash mathrm\{Pb\}(\backslash mathrm\{s\})+\backslash mathrm\{SO\}\_\{4\}\{\; \}^\{2-\}(\backslash mathrm\{aq\})$

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

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