Question

What happens when aqueous zinc sulphate is added to sodium hydroxide? Give the chemical equation of the reaction involved.

Answer 1

When aqueous zinc sulphate is added to sodium hydroxide, a white precipitate of zinc hydroxide is formed. This is a double decomposition reaction.

Chemical equation:

\[\ce{ZnSO4 + 2NaOH → Zn(OH)2 ↓ + Na2SO4}\]

Here, Zn(OH)₂ is the white precipitate formed.