PbO and PbOreact with HCl according to following chemical equations :
2PbO + 4HCl \rightarrow 2PbCl_{2} + 2H_{2}O
PbO_{2} + 4HCl \rightarrow PbCl_{2} + Cl_{2} + 2H_{2}O
Why do these compounds differ in their reactivity?

Answers (1)

Lead is present in +4 oxidation state and the stable oxidation state of lead in PbO is +2. PbO_{2} thus it can act as an oxidising agent. Therefore, it can oxidise Cl^{-} ions of HCl into Chlorine.

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