15 Facts on HCl + PbSO3: What, How To Balance & FAQs

The strong hydrochloric acid reacts with lead sulfite to produce white odorless solid. Let us study in detail the reaction of HCl+ PbSO₃.

Hydrochloric acid (HCl) is a colorless transparent liquid with an irritating odor. The lead (II) sulfite, also known as scotlandite, is the first naturally occurring, greyish-white, transparent, colorless mineral sulfite. Further reaction of sulfurous anhydride and water leads to the formation of sulfurous acid.

The following article researches balancing chemical reactions, type of reaction, net ionic reaction, etc.

What is the product of HCl and PbSO₃?

Hydrochloric acid (HCl) reacts with lead (II) sulfite (PbSO₃) to form lead dichloride, sulfur dioxide, and water. Further SO₂ reacts with H₂O to form H₂SO₃.

PbSO₃ + 2HCl → PbCl₂ + SO₂ + H₂O→ PbCl₂ + H₂SO₃

What type of reaction is HCl + PbSO₃?

HCl +PbSO₃ reaction is classified as a neutralization reaction since HCl+PbSO₃ forms lead dichloride (PbCl₂), which is a slightly soluble salt.

How to balance HCl + PbSO₃?

Follow the below steps to balance a chemical reaction –

• Write the unbalanced chemical reaction: PbSO₃ +  HCl → PbCl₂ + H₂SO₃
• Tabulate the number of moles as shown below:

Compounds	Reactant Side	Product Side
Pb	1	1
S	1	1
Cl	1	2
O	3	3
H	1	2

• It is said to be a balanced chemical reaction when the number of moles on the left side of the arrow equals the number of moles on the right side. Here, moles of hydrogen and chlorine atoms are unbalanced.

• We need to multiply 2 with HCl on the reactant side to balance the reaction.
• The Balanced chemical reaction is – PbSO₃ + 2HCl → PbCl₂ + H₂SO₃

HCl + PbSO₃ titration

HCl + PbSO₃ titration is not performed due to the absence of a base compound.

HCl + PbSO₃ net ionic equation

The net ionic equation is: PbSO₃ (s) + 2Cl^–(aq) = SO₃^2-(aq) + PbCl₂(s).

The steps followed are:

• Determine the phase/state of each element.
• PbSO₃(s) + 2HCl(aq) = H₂SO₃(aq) + PbCl₂(s)
• The Complete ionic equation is written by separating ionic compounds into their respective ions
• PbSO₃ (s) + 2H⁺(aq) + 2Cl^–(aq) = 2H⁺(aq) + SO₃^2-(aq) + PbCl₂(s) 
• The common ions present on either side of the arrow are removed.
• PbSO₃ (s) + 2H⁺(aq) + 2Cl^–(aq) = 2H⁺(aq) + SO₃^2-(aq) + PbCl₂(s) 
• The net ionic equation includes the species involved in the reaction.
• The net ionic equation is written as–
• PbSO₃ (s) + 2Cl^–(aq) = SO₃^2-(aq) + PbCl₂(s) 

HCl + PbSO₃ conjugate pairs

The conjugate acid-base pairs for HCl +PbSO₃ are –

• The conjugate base of HCl= Cl^–
• Conjugate base of PbSO₃ = SO₃^–

HCl and PbSO₃ intermolecular forces

The intermolecular forces on HCl and PbSO₃ are –

• London dispersion forces, dipole-dipole interaction, and hydrogen bonding acts on HCl because it is a polar covalent compound.
• Hydrogen bond and Dipole-dipole interaction act on PbSO₃. 

HCl + PbSO₃ reaction enthalpy

The reaction enthalpy, for HCl + PbSO₃ cannot be calculated, since enthalpy of PbSO₃ is not determined.

Is HCl + PbSO₃ a buffer solution?

The HCl +PbSO₃ is not a buffer solution because it is reacted with strong HCl acid.

Is HCl + PbSO₃ a complete reaction?

HCl +PbSO₃ is a complete reaction because, at equilibrium, complete moles of reactant is converted into a product.

Is HCl + PbSO₃ an exothermic or endothermic reaction?

The exothermic or endothermic reaction for HCl +PbSO₃ can not be performed because it depends on the reaction enthaly, which is not determined.

Is HCl + PbSO₃ a redox reaction?

HCl + PbSO₃ is not a redox reaction since no change in the oxidation state of elements is observed during the reaction.

Is HCl + PbSO₃ a precipitation reaction?

HCl + PbSO₃ is a precipitation reaction since it leads to the formation of PbCl₂, which is a slightly soluble salt.

Is HCl + PbSO₃ reversible or irreversible reaction?

HCl + PbSO₃ is an irreversible reaction and can be altered only when there is a drastic change in temperature or pressure.

Is HCl + PbSO₃ displacement reaction?

HCl + PbSO₃ shows a double displacement (metathesis) reaction. In this reaction, H₂ is traded with SO₃ to form H₂SO₃, and Cl is traded with Pb to form PbCL₂.

Conclusion

Hydrochloric acid reacts with lead (II) sulfite to form plumbous chloride (PbCL₂) and sulfurous acid. PbCl₂ is primarily used in producing infrared transmitting glass, aurene glass, lead salts, etc. The sulfurous acid produced can be used to manufacture fertilizers, dyes, metallurgical processes, and petroleum refining.