Kemija - 2009./10. jesen - 24.

${\mathrm{H}}_2{\mathrm{C}\mathrm{O}}_3\backslash mathrm\{H\}\_\{2\}\; \backslash mathrm\{CO\}\_\{3\}$

${\mathrm{C}\mathrm{O}}_3{}^{2-}\backslash mathrm\{CO\}\_\{3\}\{\; \}^\{2-\}$

${\mathrm{H}}_2\mathrm{O}\backslash mathrm\{H\}\_\{2\}\; \backslash mathrm\{O\}$

${\mathrm{O}\mathrm{H}}^{-}\backslash mathrm\{OH\}^\{-\}$