Question

Complete the equation:
$CuS{O}_4$(aq) +2 $N{H}_{4}OH$(aq)$\to$(blue ppt) + $(N{H}_4{)}_{2}S{O}_4$(aq)

• A. $\mathrm{Cu}(\mathrm{OH}{)}_2$
• B. $C{u}_{2}O$
• C. CuO

Answer 1

The correct option is A $\mathrm{Cu}(\mathrm{OH}{)}_2$

When copper sulphate reacts with ammonium hydroxide, ammonium sulphate is formed with a dark blue precipitate of copper hydroxide.
The reaction is :
$CuS{O}_4\left(aq\right)+2N{H}_{4}OH\left(aq\right)\to Cu(OH{)}_2\left(s\right)+(N{H}_4{)}_{2}S{O}_4\left(aq\right)$