Kemija - 2013./14. jesen - 38.

A. ${\mathrm{F}\mathrm{e}}^{2+}(\mathrm{a}\mathrm{q})+2{\mathrm{O}\mathrm{H}}^{-}(\mathrm{a}\mathrm{q})\to \mathrm{F}\mathrm{e}(\mathrm{O}\mathrm{H}{)}_2(\mathrm{s})\backslash mathrm\{Fe\}^\{2+\}(\backslash mathrm\{aq\})+2\; \backslash mathrm\{OH\}^\{-\}(\backslash mathrm\{aq\})\; \backslash rightarrow\; \backslash mathrm\{Fe\}(\backslash mathrm\{OH\})\_\{2\}(\backslash mathrm\{~s\})$

B. ${\mathrm{C}\mathrm{H}}_3\mathrm{C}\mathrm{O}\mathrm{O}\mathrm{H}(\mathrm{a}\mathrm{q})+{\mathrm{H}}_2\mathrm{O}(\mathrm{\ell })\rightleftharpoons {\mathrm{H}}_3{\mathrm{O}}^{+}(\mathrm{a}\mathrm{q})+{\mathrm{C}\mathrm{H}}_3{\mathrm{C}\mathrm{O}\mathrm{O}}^{-}(\mathrm{a}\mathrm{q})\backslash mathrm\{CH\}\_\{3\}\; \backslash mathrm\{COOH\}(\backslash mathrm\{aq\})+\backslash mathrm\{H\}\_\{2\}\; \backslash mathrm\{O\}(\backslash ell)\; \backslash rightleftharpoons\; \backslash mathrm\{H\}\_\{3\}\; \backslash mathrm\{O\}^\{+\}(\backslash mathrm\{aq\})+\backslash mathrm\{CH\}\_\{3\}\; \backslash mathrm\{COO\}^\{-\}(\backslash mathrm\{aq\})$

C. $2{\mathrm{A}\mathrm{g}\mathrm{N}\mathrm{O}}_3(\mathrm{a}\mathrm{q})+{\mathrm{C}\mathrm{a}\mathrm{C}\mathrm{l}}_2(\mathrm{a}\mathrm{q})\to 2\mathrm{A}\mathrm{g}\mathrm{C}\mathrm{l}(\mathrm{s})+\mathrm{C}\mathrm{a}{\left({\mathrm{N}\mathrm{O}}_3\right)}_2(\mathrm{a}\mathrm{q})2\; \backslash mathrm\{AgNO\}\_\{3\}(\backslash mathrm\{aq\})+\backslash mathrm\{CaCl\}\_\{2\}(\backslash mathrm\{aq\})\; \backslash rightarrow\; 2\; \backslash mathrm\{AgCl\}(\backslash mathrm\{s\})+\backslash mathrm\{Ca\}\backslash left(\backslash mathrm\{NO\}\_\{3\}\backslash right)\_\{2\}(\backslash mathrm\{aq\})$

D. $2{\mathrm{H}}_2\mathrm{O}(\mathrm{\ell })+2\mathrm{N}\mathrm{a}(\mathrm{s})\to 2\mathrm{N}\mathrm{a}\mathrm{O}\mathrm{H}(\mathrm{a}\mathrm{q})+{\mathrm{H}}_2(\mathrm{g})2\; \backslash mathrm\{H\}\_\{2\}\; \backslash mathrm\{O\}(\backslash ell)+2\; \backslash mathrm\{Na\}(\backslash mathrm\{s\})\; \backslash rightarrow\; 2\; \backslash mathrm\{NaOH\}(\backslash mathrm\{aq\})+\backslash mathrm\{H\}\_\{2\}(\backslash mathrm\{~g\})$