Question

How will you prepare the following?
Ammonium sulphate from ammonium hydroxide

Answer 1

$PbS{O}_4+2N{H}_{4}OH\to {\left(N{H}_4\right)}_{2}S{O}_4+Pb{\left(OH\right)}_2$

Lead sulphere $\to PbS{O}_4$

Ammonium hydroxide $\to N{H}_{4}OH$

Ammonium sulphere $\to {\left(N{H}_4\right)}_{2}S{O}_4$

Lead hydroxide $\to Pb{\left(OH\right)}_2$

This $R\times n$ is an example of double displacement reaction.