Question

Name the following:

A Lead compound that can be used to oxidise Hydrogen Chloride to Chlorine.

Answer 1

• The heating of concentrated Hydrochloric acid with oxidising agents such as Lead (IV) oxide, Manganese dioxide etc., oxidized to water and Chlorine gas which is a greenish-yellow gas.
• The chemical reaction is, $$\begin{gathered} {\mathrm{PbO}}_2\left(\mathrm{s}\right)+4\mathrm{HCl}\left(aq\right)\to {\mathrm{PbCl}}_2\left(\mathrm{s}\right)+2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)+{\mathrm{Cl}}_2\left(\mathrm{g}\right) \\ \mathrm{Lead}\left(\mathrm{IV}\right)\mathrm{Hydro}gen\mathrm{Lead}\mathrm{Water}\mathrm{Chlorine} \\ \mathrm{oxide}chloride\mathrm{chloride} \end{gathered}$$
• Lead (IV) oxide on reacting with Hydrogen chloride, Lead chloride, water and Chlorine is formed.
• Therefore, the Lead compound which can be used to oxidise Hydrogen Chloride to Chlorine is Lead (IV) oxide.