Question

Complete and balance the following equation and also state the type of reaction that is taking place :

$\mathrm{Pb}{\left({\mathrm{NO}}_3\right)}_2+\mathrm{NaCl}\to$

Answer 1

• When Lead nitrate reacts with Sodium chloride, it gives Lead chloride and Sodium nitrate.
• The balanced chemical equation can be written as:

$\underset{\mathrm{Lead}\mathrm{nitrate}}{\mathrm{Pb}{\left({\mathrm{NO}}_3\right)}_2\left(\mathrm{aq}\right)}+\underset{\mathrm{Sodium}\mathrm{chloride}}{2\mathrm{NaCl}\left(\mathrm{aq}\right)}\to \underset{\mathrm{Lead}\mathrm{chloride}}{{\mathrm{PbCl}}_2\left(\mathrm{s}\right)}+\underset{\mathrm{Sodium}\mathrm{nitrate}}{2{\mathrm{NaNO}}_3\left(\mathrm{aq}\right)}$

• It is an example of a double decomposition reaction.
• Double decomposition: A double decomposition reaction is a type of decomposition reaction in which two constituent reactants interchange positive and negative ions and form two new compounds.