Kemija - 2025./26. jesen - 26.

$\mathrm{C}\mathrm{u}\to {\mathrm{C}\mathrm{u}}^{2+}+2{\mathrm{e}}^{-}\backslash mathrm\{Cu\}\; \backslash rightarrow\; \backslash mathrm\{Cu\}^\{2+\}+2\; \backslash mathrm\{e\}^\{-\}$

${\mathrm{C}\mathrm{u}}^{2+}+2{\mathrm{e}}^{-}\to \mathrm{C}\mathrm{u}\backslash mathrm\{Cu\}^\{2+\}+2\; \backslash mathrm\{e\}^\{-\}\; \backslash rightarrow\; \backslash mathrm\{Cu\}$

${\mathrm{S}\mathrm{O}}_4^{2-}+4{\mathrm{H}}_3{\mathrm{O}}^{+}+2{\mathrm{e}}^{-}\to {\mathrm{S}\mathrm{O}}_2+6{\mathrm{H}}_2\mathrm{O}\backslash mathrm\{SO\}\_\{4\}^\{2-\}+4\; \backslash mathrm\{H\}\_\{3\}\; \backslash mathrm\{O\}^\{+\}+2\; \backslash mathrm\{e\}^\{-\}\; \backslash rightarrow\; \backslash mathrm\{SO\}\_\{2\}+6\; \backslash mathrm\{H\}\_\{2\}\; \backslash mathrm\{O\}$

${\mathrm{S}\mathrm{O}}_2+6{\mathrm{H}}_2\mathrm{O}\to {\mathrm{S}\mathrm{O}}_4^{2-}+4{\mathrm{H}}_3{\mathrm{O}}^{+}+2{\mathrm{e}}^{-}\backslash mathrm\{SO\}\_\{2\}+6\; \backslash mathrm\{H\}\_\{2\}\; \backslash mathrm\{O\}\; \backslash rightarrow\; \backslash mathrm\{SO\}\_\{4\}^\{2-\}+4\; \backslash mathrm\{H\}\_\{3\}\; \backslash mathrm\{O\}^\{+\}+2\; \backslash mathrm\{e\}^\{-\}$