15 Facts on H2SO4 + PbCl2: What, How To Balance & FAQs

PbCl2 is a white solid inorganic compound under ambient conditions, and H2SO4 is a strong acid. Let us see the reaction of H2SO4 and PbCl2.

PbCl2 naturally occurs in the ore form, Cotunnite, and Sulfuric acid, a colorless and clear solution. PbCl2 is poorly soluble in water. H2SO4 known in antiquity as oil of vitriol, is a mineral acid. Pure sulfuric acid does not exist naturally on Earth due to its strong affinity to water vapor.

This article will discuss some facts about the reaction, like the type of reaction and net ionic equation.

What is the product of H2SO4 and PbCl2

Lead sulfate and hydrogen chloride are product of the H2SO4 + PbCl2 reaction.

H2SO4 + PbCl2 =  Pb(SO)4 + 2 HCl

What type of reaction is H2SO4 + PbCl2

H2SO4 + PbCl2 is a precipitate exchange reaction.

How to balance H2SO4 + PbCl2

The reaction H2SO4 + PbCl2 is balanced using the following steps:

H2SO4 + PbCl2 =  Pb(SO)4 + 2 HCl

  • The first thing we check is the number of atoms on the reactant and product sides.
  • After that, if the number of atoms is not the same, then we have done multiplication of the smallest figure according to the formula.
  • In the above equation, the H atom and Cl atoms number are not the same
  • In this next step, we should multiply HCl by 2.
  • Thus the balance equation is
  • H2SO4 + PbCl2 =  Pb(SO)4 + 2 HCl

H2SO4 + PbCl2 titration

Titration is not possible in the reaction H2SO+ PbCl2 because H2SO4 is an acid, and when it reacts with PbCl2, it forms a precipitate of Pb(SO4).

H2SO4 + PbCl2 net ionic equation

The net ionic equation for the reaction H2SO+ PbCl2 is

PbCl2(s) + SO42-(aq) = PbSO4(s) + 2Cl(aq)

To derive the net ionic equation, the following steps are followed

  • First, the soluble ionic compounds can dissociate into ions.
  • PbCl2(s) + 2H+(aq) + SO42-(aq) = PbSO4(s) + 2H+(aq) + 2Cl(aq)
  • Spector ions  2H+ is cancelled out.
  • Thus the net ionic equation is
  • PbCl2(s) + SO42-(aq) = PbSO4(s) + 2Cl(aq)

H2SO4 + PbCl2 conjugate pairs

The Conjugate pairs of H2SO+ PbCl2 in below :

  •  H2SO+ PbCl2 does not form conjugate pairs because PbSO4 is in precipitate form.
  • conjugated base of H2SO4 is HSO4.

H2SO4 + PbCl2 intermolecular forces

H2SO4 + PbCl2 reaction enthalpy

The reaction enthalpy of H2SO+ PbCl2 reaction is 14.21 KJ.

Is H2SO4 + PbCl2 a buffer solution?

H2SO+ PbCl2 reaction can not form a buffer solution because H2SO4 is a strong acid.

Is H2SO4 + PbCl2 a complete reaction?

H2SO+ PbCl2 is a complete reaction because lead sulfate and hydrogen chloride are formed in reaction.

Is H2SO4 + PbCl2 an exothermic or endothermic reaction?

H2SO+ PbCl2 is an endothermic reaction because ΣΔH°f (products) is greater than ΣΔH°f (reactants).

Exothermic PbCl2
Endothermic Reaction Plot

Is H2SO4 + PbCl2 a redox reaction?

H2SO4 + PbCL2 is not a redox reaction.

Is H2SO4 + PbCl2 a precipitation reaction?

H2SO+ PbCl2 is a precipitation reaction as PbSO4 produces precipitate.

Is H2SO4 + PbCl2 reversible or irreversible reaction?

H2SO+ PbCl2 is irreversible reaction because the product of the reaction is a residue, so it is an irreversible reaction.

Is H2SO4 + PbCl2 displacement reaction?

H2SO+ PbCl2 is a double displacement reaction because H replaces Pb from Pb(NO3)2 and formed HNO3 , and Pb replaces H from H2SO4 and formed PbSO4 .

Dis PbCl2
Displacement reaction


From this article, we understand that this is a double displacement, irreversible, and endothermic reaction, which means it needs some energy to do the reaction. We can use this reaction to produce HCl.