Question

When ammonia is passed through $C{d}^{2+}\left(aq\right)$, a colourless solution $A$ is formed. What is the formula of $A?$

• A. $CdS{O}_4$
• B. $\left[Cd\right(N{H}_3{)}_4{]}^{2+}$
• C. $Cd(OH{)}_2$
• D. $CdC{O}_3.Cd(OH{)}_2$

Answer 1

The correct option is B $\left[Cd\right(N{H}_3{)}_4{]}^{2+}$

$C{d}^{2+}\left(aq\right)+4N{H}_3\left(aq\right)\to \underset{\text{Colourless}}{\left[Cd\right(N{H}_3{)}_4{]}^{2+}\left(aq\right)}$