13 Facts on HCl + Li3PO4: What, How To Balance & FAQs

The chemical names of HCl and Li3PO4 are hydrochloric acid and lithium phosphate. Let us discuss how to balance HCl + Li3PO4 chemical reaction below.

Hydrochloric acid is a strong acid composed of 1 hydrogen atom and 1 chlorine atom. Lithium phosphate is a salt and consists of metallic and non-metallic elements i.e. 3 lithium, 1 phosphorous, and 4 oxygen atoms. Li3PO4 is generally used in batteries.

 This article discusses how to balance, product, reaction enthalpy, type of reaction, buffer solution, and many more facts and FAQs on HCl + Li3PO4 reaction.

What is the product of HCl and Li3PO4?

The product of HCl and Li3PO4 reaction is lithium chloride (LiCl) and phosphoric acid (H3PO4). When HCl is treated with Li3PO4 there is the formation of the LiCl and H3PO4 as a product .

3HCl (aq) + Li3PO4 (s) 3LiCl (aq) + H3PO4 (aq)

What type of reaction is HCl + Li3PO4?

The HCl and Li3PO4 is a double displacement or salt metathesis reaction.

How to balance HCl + Li3PO4?

  • The HCl + Li3PO4 chemical equation gets balanced using the following steps.
  • The unbalanced reaction equation is:
  • HCl + Li3PO4 → LiCl + H3PO4
  • To balance both sides first multiply HCl by three on the reactant side we get.
  • 3 HCl + Li3PO4 → LiCl + H3PO4
  • Later multiplying LiCl with three on the product side we get the complete balanced equation as follows.
  • 3HCl + Li3PO4 → 3LiCl + H3PO4

HCl + Li3PO4 net ionic equation.

  • The net ionic equation of HCl + Li3PO4 chemical reaction is given below:
  • Li3PO4(s) + 3H+(aq) + 3Cl(aq) = 3Li+(aq) + 3Cl(aq) + 3H+(aq) + PO43-(aq)

HCl + Li3PO4 conjugate pairs.

HCl and Li3PO4 are conjugate pairs. HCl is a strong acid and dissociates as H+ and Cl- ions. As the HCl donates its protons, Cl- acts as a conjugate base and the H+ ion act as conjugate acid. Thus, LiCl is the conjugate base and H3PO4 is the conjugate acid.

HCl and Li3PO4 intermolecular forces.

  • The intermolecular force of attraction between HCl and Li3PO4 is:
  • HCl = dipole-dipole intermolecular force.
  • Li3PO4 = ion-dipole intermolecular force.

HCl + Li3PO4 reaction enthalpy.

  • The reaction enthalpy of HCL + Li3PO4 is – 1880.9 kJ/mol.
  • HCl = enthalpy of formation of HCl is −92.3 kJ/mol.
  • Li3PO4 = enthalpy of formation of Li3PO4 is 298.15 K, kJ/mol.
  • LiCl = enthalpy of formation of LiCl is -409 kJ/mol
  • H3PO4 = enthalpy of formation of H3PO4 is -1265.7 kJ/mol
  • Reaction enthalpy of HCl + Li3PO4 is = enthalpy of product – enthalpy of reactant
  • Reaction enthalpy of HCl + Li3PO4 is = – 1674.7 – (206.2) = – 1880.9 kJ/mol

Is HCl + Li3PO4 a buffer solution?

HCl + Li3PO4 can form a buffer solution. As in the HCl, it contains HCl which is a strong acid and Li3PO4 is a basic salt that has a pH value of more than 7 that can form a buffer solution.

Is HCl + Li3PO4 a complete reaction?

HCl + Li3PO4 is not a complete reaction as it is not a reversible reaction and not achieving equilibrium. The reaction is a complete reaction only if achieves equilibrium.

Is HCl + Li3PO4 an exothermic or endothermic reaction?

HCl is a strong acid shows an exothermic reaction and Li3PO4 is a basic salt shows an endothermic reaction. If Li3PO4 salt dissolve in water or other substance shows an endothermic reaction.

Is HCl + Li3PO4 a precipitation reaction?

HCl + Li3PO4 is a precipitate reaction. When HCl reacts with Li3PO4 forms a precipitate of LiCl salt and H3PO4 acid.

Is HCl + Li3PO4 reversible or irreversible reaction?

HCl + Li3PO4 is an irreversible reaction and not a reversible reaction, as this reaction is not a redox reaction and cannot acquire equilibrium.

Is HCl + Li3PO4 displacement reaction?

HCl + Li3PO4 is not a displacement reaction as no atoms of the reaction displaced other atoms because it is a double displacement reaction. In this reaction, there is the exchange of atoms occurs causing a double displacement reaction.


HCl + Li3PO4 is a reaction that occurs between a strong acid and a basic salt. It is a double displacement reaction and shows a balanced equation 3HCl + Li3PO4 → 3LiCl + H3PO4. The product of this reaction is LiCl and H3PO4. It is an endothermic reaction.

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Dr. Shruti Ramteke

Hello everyone I am Dr. Shruti M Ramteke, i did my Ph.D in chemistry. I have five years of teaching experience for 11-12 standard, B,Sc and MSc in chemistry subject. I have published total five research articles during Ph.D on my research work and i have fellowship from UGC for my Ph.D. My Masters with specilization Inorganic chemistry and my graduation with chemistry, zoology and environmental science subjects. thank You

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