Question

Give the balanced equations for reactions of aqueous ammonia with the following:

Lead nitrate

Answer 1

Reaction with lead nitrate $\left(\mathrm{Pb}{\left({\mathrm{NO}}_3\right)}_2\right)$:

• Ammonium hydroxide$\left({\mathrm{NH}}_4\mathrm{OH}\right)$ reacts with lead nitrate solution to produce a white precipitate of $\mathrm{Pb}(\mathrm{OH}{)}_2$, which is insoluble in excess of ammonium hydroxide.
• One mole of $\mathrm{Pb}{\left({\mathrm{NO}}_3\right)}_2$ reacts with two moles of ${\mathrm{NH}}_4\mathrm{OH}$ to form one mole of $\mathrm{Pb}(\mathrm{OH}{)}_2$ and two moles of ${\mathrm{NH}}_4{\mathrm{NO}}_3$.

The balanced chemical equation is:

$\mathrm{Pb}{\left({\mathrm{NO}}_3\right)}_2\left(\mathrm{aq}\right)+2{\mathrm{NH}}_4\mathrm{OH}\left(\mathrm{aq}\right)⟶\mathrm{Pb}(\mathrm{OH}{)}_2\left(\mathrm{s}\right)\downarrow +2{\mathrm{NH}}_4{\mathrm{NO}}_3(\mathrm{aq})$