15 Facts on HCl + Ag3PO4: What, How To Balance & FAQs

Silver phosphate, a water-immiscible salt, reacts with strong acids like hydrochloric acid. Let us look into how their reaction take place.

Hydrochloric acid (HCl) in reaction with Silver phosphate (Ag3PO4) forms a white crystalline solid and a weak acid. An aqueous solution of hydrogen chloride gas produces the colorless liquid, HCl. Its physical properties change with concentration. Ag3PO4 is an odorless inorganic chemical with a translucent yellow appearance.

The sections that follow will go into detail about the products formed when HCl reacts with Ag3PO4, the reaction type, intermolecular forces, etc.

What is the product of HCl and Ag3PO4

Silver chloride (AgCl) and Phosphoric acid (H3PO4) are formed as products when Hydrochloric acid (HCl) is reacted with Silver phosphate (Ag3PO4).

3HCl (aq) + Ag3PO4 (s) —> H3PO4 (aq) + 3AgCl (s)

What type of reaction is HCl + Ag3PO4

Ag3PO4 + HCl is a Double displacement reaction, also known as a metathesis reaction.

How to balance HCl + Ag3PO4

The balanced chemical equation for HCl + Ag3PO4 using hit and trial approach is as follows:

3HCl + Ag3PO4 = H3PO4 + 3AgCl

The steps for balancing the reaction scheme mentioned above are as follows:

  • The total number of atoms of elements present on both the left and right sides of the unbalanced reaction is counted.
AtomsReactant SideProduct Side
Count of number of atoms of elements
  • The atoms of silver and hydrogen are equated by multiplying the compounds AgCl and HCl by coefficient 3, thereby balancing the entire reaction.
  • The overall balanced chemical equation is,
  • 3HCl + Ag3PO4 = H3PO4 + 3AgCl
  • The elements on the reactant and product sides are now balanced, with 3 silver atoms, 1 phosphorus atom, 3 chlorine atoms, 4 oxygen atoms, and 3 hydrogen atoms on either side of the reaction.

HCl + Ag3PO4 Titration

Ag3PO4 cannot be titrated against HCl as Ag3PO4 is a silver salt that is colorless when dissolved in an acidic solution. As a result, it detects no noticeable color change even when an indicator like phenolphthalein or methyl orange is used.

HCl + Ag3PO4 Net Ionic Equation

The net ionic equation for HCl + Ag3PO4 is:

3Cl(aq) + Ag3PO4(s) = PO43-(aq) + 3AgCl(s)

Following are the steps to derive the net ionic equation:

  • The corresponding physical states of the balanced chemical reaction is mentioned.
  • 3HCl (aq) + Ag3PO4 (s) —> H3PO4 (aq) + 3AgCl (s)
  • The ionic species present in the aqueous phase that are participating in the reaction are split into their respective ions.
  • The net ionic equation is deduced by removing the spectator ions (in this case H+) from the complete ionic equation. The overall net ionic equation for the reaction between HCl + Ag3PO4 is as follows:
  • 3Cl(aq) + Ag3PO4(s) = PO43-(aq) + 3AgCl(s)

HCl + Ag3PO4 Conjugate Pairs

HCl + Ag3PO4 has the following conjugate acid-base pairs:

  • Cl is the conjugate base of HCl
  • PO43- is a strong base that accepts a proton (H+) to form its conjugate acid HPO42-.

HCl + Ag3PO4 Intermolecular Forces

HCl and Ag3PO4 have the following intermolecular forces:

  • London dispersion forces and dipole-dipole interactions are the two forces observed between the HCl molecules.
  • Ag3PO4 is composed of ions, thus the intermolecular forces of attraction between the molecules are ionic forces of attraction. Phosphate ions in it are held together by dipole-dipole interactions.
Intermolecular bonding in Ag3PO4

HCl + Ag3PO4 Reaction Enthalpy

The enthalpy of the reaction HCl and Ag3PO4 has not been determined since no thermodynamic information has been documented in the literature.

Is HCl + Ag3PO4 a Buffer Solution

HCl + Ag3PO4 does not function as a buffer solution because of the presence of a strong acid, HCl, which does not satisfy the criteria for buffer formation.

Is HCl + Ag3PO4 a Complete Reaction

The reaction HCl + Ag3PO4 is complete since all of the reactants are consumed to produce two stable products, silver chloride (AgCl) and phosphoric acid (H3PO4) at equilibrium.

Is HCl + Ag3PO4 an Exothermic or Endothermic Reaction

The exothermic or endothermic nature of the HCl + Ag3PO4 reaction cannot be predicted as its enthalpy is not determined.

Is HCl + Ag3PO4 a Redox Reaction

HCl + Ag3PO4 is not a redox reaction because the oxidation states of the atoms involved do not change during the reaction.

Is HCl + Ag3PO4 a Precipitation Reaction

HCl + Ag3PO4 is a precipitation reaction because silver chloride (AgCl) is obtained as an insoluble solid residue at the end of the reaction.

What is the process of balancing a chemical equation involving HCl and Mg3P2?

The process of balancing a chemical equation involving HCl and Mg3P2 requires attention to specific hcl and mg3p2 balancing facts. By adjusting the coefficients in front of each compound, one can ensure that the number of atoms of each element on both sides of the equation is equal. It is important to maintain the integrity and accuracy of the equation to represent the balanced reaction properly.

Is HCl + Ag3PO4 Reversible or Irreversible Reaction

HCl + Ag3PO4 is irreversible due to the unidirectional nature of the reaction and the formed products cannot be converted back into the original reactants.

Is HCl + Ag3PO4 Displacement Reaction

HCl + Ag3PO4 is an example of a double displacement reaction in which the cationic and anionic components of the reactants switch positions to generate the products. Ag+ is displaced by H+ forming AgCl and similarly PO43- is displaced by Cl to form H3PO4.

displacement 2
Displacement mechanism


Phosphoric acid and silver chloride is formed by a double displacement reaction between hydrochloric acid and silver phosphate. H3PO4 is a colorless, odorless phosphorus oxoacid used in a variety of industries and AgCl is a white crystalline solid that is popularly used as a reference electrode in electrochemistry.