Question

What will you observe when ammonium hydroxide is added to iron (II) sulphate?

Answer 1

When Iron (II)sulphate react with ammonium hydroxide,

• A dirty green precipitate is formed.
• This precipitate due to the formation of ferric hydroxide.
• ${\mathrm{FeSO}}_4+2{\mathrm{NH}}_4\mathrm{OH}\to \underset{\mathrm{diryt}\mathrm{green}\mathrm{precipitate}}{\mathrm{Fe}{\left(\mathrm{OH}\right)}_2}+{\left({\mathrm{NH}}_4\right)}_2{\mathrm{SO}}_4$
• It is not soluble in excess reagent.
• It turns to reddish brown precipitate slowly due to the oxidation and form Fe(OH)₃
• $4\mathrm{Fe}{\left(\mathrm{OH}\right)}_2+{\mathrm{O}}_2+2{\mathrm{H}}_2\mathrm{O}\to \underset{\mathrm{reddish}\mathrm{brown}\mathrm{precipitate}}{2\mathrm{Fe}{\left(\mathrm{OH}\right)}_3}$