Kemija - 2015./16. jesen - 15.

A. ${\mathrm{C}\mathrm{O}}_2(\mathrm{g})+2\mathrm{N}\mathrm{a}\mathrm{O}\mathrm{H}(\mathrm{a}\mathrm{q})\to {\mathrm{N}\mathrm{a}}_2{\mathrm{C}\mathrm{O}}_3(\mathrm{a}\mathrm{q})+{\mathrm{H}}_2(\mathrm{g})+1\mathrm{/}2{\mathrm{O}}_2(\mathrm{g})\backslash mathrm\{CO\}\_\{2\}(\backslash mathrm\{g\})+2\; \backslash mathrm\{~NaOH\}(\backslash mathrm\{aq\})\; \backslash rightarrow\; \backslash mathrm\{Na\}\_\{2\}\; \backslash mathrm\{CO\}\_\{3\}(\backslash mathrm\{aq\})+\backslash mathrm\{H\}\_\{2\}(\backslash mathrm\{g\})+1/2\; \backslash mathrm\{~O\}\_\{2\}(\backslash mathrm\{g\})$

B. ${\mathrm{N}\mathrm{a}}_2{\mathrm{C}\mathrm{O}}_3(\mathrm{s})+\mathrm{C}\mathrm{a}(\mathrm{O}\mathrm{H}{)}_2(\mathrm{a}\mathrm{q})\to {\mathrm{C}\mathrm{a}\mathrm{C}\mathrm{O}}_3(\mathrm{s})+2\mathrm{N}\mathrm{a}\mathrm{O}\mathrm{H}(\mathrm{a}\mathrm{q})\backslash mathrm\{Na\}\_\{2\}\; \backslash mathrm\{CO\}\_\{3\}(\backslash mathrm\{s\})+\backslash mathrm\{Ca\}(\backslash mathrm\{OH\})\_\{2\}(\backslash mathrm\{aq\})\; \backslash rightarrow\; \backslash mathrm\{CaCO\}\_\{3\}(\backslash mathrm\{s\})+2\; \backslash mathrm\{~NaOH\}(\backslash mathrm\{aq\})$

C. ${\mathrm{C}\mathrm{O}}_2(\mathrm{g})+2\mathrm{N}\mathrm{a}\mathrm{O}\mathrm{H}(\mathrm{a}\mathrm{q})\to {\mathrm{N}\mathrm{a}}_2{\mathrm{C}\mathrm{O}}_3(\mathrm{a}\mathrm{q})+{\mathrm{H}}_2\mathrm{O}(\mathrm{\ell })\backslash mathrm\{CO\}\_\{2\}(\backslash mathrm\{g\})+2\; \backslash mathrm\{~NaOH\}(\backslash mathrm\{aq\})\; \backslash rightarrow\; \backslash mathrm\{Na\}\_\{2\}\; \backslash mathrm\{CO\}\_\{3\}(\backslash mathrm\{aq\})+\backslash mathrm\{H\}\_\{2\}\; \backslash mathrm\{O\}(\backslash ell)$

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