15 Facts on HCl + PbSO4: What, How To Balance & FAQs

Lead sulfate(PbSO₄)is an oxidizing agent. Hydrochloric acid(HCl) is liquid or gas. Let us discuss some reactions and properties about HCl + PbSO₄.

Lead sulfate is an inorganic compound which is not soluble in water and it is a white color crystalline compound. After heating it releases fumes. Hydrochloric is a strong acid and it is a colorless, non flammable gas  with an irritating smell. This compound is highly reactive in nature and also water soluble.

Now in this article we are going to learn about such properties as the net ionic equation, enthalpy, buffer solution, reaction type,etc.

What is the product of HCl + PbSO₄ ?

HCl + PbSO₄ form lead chloride(PbCl₂)and sulphuric acid(H₂SO₄).

PbSO₄ +  2HCl  →  PbCl₂ +  H₂SO₄

What type of reaction is HCl + PbSO₄ ?

It is a double displacement metathesis type reaction.

PbSO₄ +  2HCl  →  PbCl₂ +  H₂SO₄

How to balance HCl + PbSO₄ ?

The unbalanced equation for the reaction HCl + PbSO₄ is written as-

PbSO₄ + HCl  →  PbCl₂  + H₂SO₄

For balancing this equation, we should follow these steps that is written below-

• In this equation, Pb, O, S atoms are equal on both reactant and the product side of this reaction.
• The H and Cl atoms are not equal on both reactant and product sides.
• The number of Cl atoms, before and after the reaction 1 and 2 , respectively
• PbSO₄ + HCl  →  PbCl₂  + H₂SO₄
• Now, we will multiply HCl by 2, so the number of Pb atom becomes the same but the number of Cl atoms becomes 2.
• PbSO₄ + 2HCl  →  PbCl₂  + H₂SO₄
• Now, the number of H atoms will naturally become the same on both reactant and product sides.
• Finally, the balanced equation is-
• PbSO₄ + 2HCl  →  PbCl₂  + H₂SO₄

HCl + PbSO₄ titration

To examine the amount of the insoluble salt PbSO₄ by HCl, we have to do titration-

Apparatus

• Burette 
• Beaker
• Pippate
• Conical flask
• Volumetric flask
• HCl-Titrant, whose concentration is known
• PbSO₄ -Titre, whose con concentration is unknown

Indicator

Methyl orange is used as an indicator because of the presence of acidic solution.

Procedure

• Firstly weigh the sample of lead sulfate and dissolve in hot water and mix it well in a conical flask.
• Now add this sample into the burette.
• The titrant is taken into the pipette and poured into the conical flask.
• After that add that unknown sample in the conical flask drop wise where the reaction occurs.
• The indicator methyl orange is added to the conical flask.
• The end point occurs when it turns into a yellow color.
• The above process is repeated a minimum three times for consistent reading.
• The concentration of this solution is calculated by a₁m₁v₁=a₂v₂m₂.

HCl + PbSO₄ net ionic equation

The net ionic equation of HCl + PbSO₄ is written as-

PbSO₄(s) + 2H⁺(aq) + 2Cl^–(aq)  →  PbCl₂(s) + 2H⁺(aq) + SO₄^-2(aq)

Follow the steps that mentioned below to get net ionic equation-

• The complete ionic equation is written as follows
• Pb⁺²(s) + SO₄^-2(s) + 2H⁺(aq) +2Cl^–(aq)  →  Pb⁺²(s) +2Cl^–(s) + 2H⁺(aq) + SO₄^-2(aq)
• In this equation H⁺ ion is a spectator ion which is canceled on both sides.
•  After canceling the spectator ion from both reactant and product sides, we get the net ionic equation.
• Thus, the net ionic equation-
• PbSO₄(s) + 2Cl^–(aq)  →  PbCl₂(s)  + SO₄^-2(aq)

HCl + PbSO₄ Conjugated Pair ?

In the reaction of HCl + PbSO₄ the available conjugated pairs are as follows-

• The conjugate acid of H₂SO₄= HSO₄^–

• The conjugate acid of HCl = Cl^–

HCl + PbSO₄ intermolecular forces ?

HCl + PbSO₄ has following intermolecular forces

• HCl contains dipole dipole interaction because of the interaction of opposite charges. Induced dipole – induced dipole force also exists in this molecule.
• PbSO₄ is containing ionic forces due to the presence of the lead and sulfate ions.

HCl + PbSO₄ reaction enthalpy ?

The reaction enthalpy of HCl + PbSO₄ is -14.2 KJ/mol.It is calculated using the values given in the table below-

• Reaction Enthalpy = ΣΔH_f°(products) – ΣΔH_f° (reactants)  

• [(-919.9) + (2*-167.1) – (-359.2) + (-909.2)] 

• ∆H = -14.2 kJ/mole

Is HCl + PbSO₄ a buffer solution ?

HCl + PbSO₄ does not produce a buffer solution because both of these compounds act as strong electrolytes.

Is HCl + PbSO₄ a complete reaction ?

HCl + PbSO₄ is a complete reaction because after the formation of PbCl₂ and H₂SO₄ there are no other compounds formed and no further reaction is possible.

Is HCL + PbSO₄ an exothermic or endothermic reaction ?

HCl + PbSO₄ reaction is an exothermic reaction because overall enthalpy is negative, therefore the reaction is releasing heat.

Is HCl + PbSO₄ a redox reaction ?

HCl + PbSO₄ is not a redox reaction because the oxidation state of both reactant and product side are similar and the atoms are not changing their state.

Is HCl + PbSO₄ a precipitation reaction ?

HCl + PbSO₄ is a precipitation reaction because PbSO₄ is hardly dissolved in water and it is present in precipitate form.

Is HCl + PbSO₄ a reversible or irreversible reaction ?

HCl + PbSO₄ is a reversible reaction because the same product HCl and PbSO₄ is formed when PbCl₂ and H₂SO₄ react together.

Is HCl + PbSO₄ displacement reaction ?

HCl + PbSO₄ is a double displacement reaction in which reaction cations and anions are formed.Because in the above reaction, H⁺ was displaced by Pb⁺² from HCl, and Pb⁺² was displaced by proton from the PbSO₄.

Conclusion

Lead(2) sulfate is odorless solid, it is soluble in sodium hydroxide but less soluble in water. It is used as a catalyst and toxic in nature and it is generally used in many industries. Hydrochloric acid is universally used for acid base reactions.