Hydrochloric acid is HCl.
Answers (1)
Iron and lead react differently with hydrochloric acid due to their positions in the reactivity series of metals:
Iron (Fe) and Hydrochloric Acid (HCl): Iron reacts with hydrochloric acid to produce iron chloride (FeCl2) and hydrogen gas (H2) as follows:
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Fe+2HCl→FeCl2+H2
This is a typical metal-acid reaction where the metal displaces hydrogen from the acid, resulting in the formation of a salt and the evolution of hydrogen gas.
Lead (Pb) and Hydrochloric Acid (HCl): Lead is less reactive than iron and does not react readily with dilute hydrochloric acid. This is due to lead's position in the reactivity series; it is below hydrogen and thus does not displace hydrogen from the acid.
When iron (Fe) reacts with hydrochloric acid (HCl), it undergoes a single displacement reaction, displacing hydrogen from the acid to form iron chloride (FeCl2) and hydrogen gas (H2). The chemical equation for this reaction is:
2HCl + Fe → FeCl2 + H2
On the other hand, lead (Pb) does not react vigorously with hydrochloric acid at room temperature due to the formation of a protective layer of lead chloride (PbCl2) on its surface. However, with concentrated hydrochloric acid and heating, lead can slowly react to form lead chloride and hydrogen gas:
2HCl + Pb → PbCl2 + H2
These reactions demonstrate the variable reactivity of metals with hydrochloric acid, with iron reacting more readily compared to lead.