Question

Explain the following:
(d) Lead carbonate does not react with dilute $\text{HCl}$.

Answer 1

The lead carbonate does not react with dilute. $\text{HCl}$ because the initial reaction causes the formation of a layer of lead (II) chloride. That is,
${PbCO}_3+\text{dil.}\text{HCl}\to {PbCl}_2+{CO}_2+H_{2}O$
This layer is insoluble in water. and apparently forms a layer that prohibits the reaction of lead carbonate and $\text{dil. HCl}$