Question

State your observation when excess sodium hydroxide is added to calcium nitrate solution.

Answer 1

When sodium hydroxide reacts with calcium nitrate white precipitates of Ca(OH)₂ is obtained. These precipitates are insoluble in excess.$$\begin{gathered} 2\mathrm{NaOH}\left(\mathrm{aq}\right)+\mathrm{Ca}{\left({\mathrm{NO}}_3\right)}_2\left(\mathrm{s}\right)\to \mathrm{Ca}{\left(\mathrm{OH}\right)}_2\left(\mathrm{s}\right)+2{\mathrm{NaNO}}_3\left(\mathrm{aq}\right) \\ \mathrm{Sodium}\mathrm{hydroxide}\mathrm{Calcium}\mathrm{nitrate}\mathrm{Calcium}\mathrm{hydroxide}\mathrm{Sodium}\mathrm{nitrate} \end{gathered}$$