Question

State what do you observe when ammonium hydroxide is added to iron (III) sulphate solution.

Answer 1

When adding ammonium hydroxide to iron (III) sulphate solution:

• A reddish-brown precipitate of iron (III) hydroxide is produced.
• The following chemical reaction shows the reaction of ammonium hydroxide in iron (III) sulphate solution:

$$\begin{gathered} {\mathrm{Fe}}_2{\left({\mathrm{SO}}_4\right)}_3\left(\mathrm{s}\right)+6{\mathrm{NH}}_4\mathrm{OH}\left(\mathrm{aq}\right)\to 2\mathrm{Fe}{\left(\mathrm{OH}\right)}_3\left(\mathrm{s}\right)+3{\left({\mathrm{NH}}_4\right)}_2{\mathrm{SO}}_4\left(\mathrm{s}\right) \\ \mathrm{Iron}\left(\mathrm{III}\right)\mathrm{hydroxide} \\ (\mathrm{Reddish}\mathrm{brown}\mathrm{ppt}.) \end{gathered}$$