15 Facts on HCl + Mn2O3: What, How to Balance & FAQs

Mn2O3 is a mineral and acts as a base, whereas HCl is a strong acid. Let us see how their reaction workup.

Another name for HCl is muriatic acid, whose physical properties depend upon concentration, while Mn2O3 is a naturally occurring mineral such as α-Mn2O3 from bixbyite. Mn2O3 is a black powder and its solubility is very low and exists in orthorhombic structure at below 29°C and above this temperature exists in cubic.

In this article, we will grasp some of the characteristics of this reaction, like its products, intermolecular forces, and displacement type.

What is the product of HCl and Mn2O3

HCl reacts with Manganese (III)oxide to form manganese chloride, chlorine gas, and water molecule as by-products.

Mn2O3 + 6HCl → 2MnCl2 + Cl2 + 3H2O

What type of reaction is HCl + Mn2O3

The reaction between HCl and Mn2O3 is a redox reaction since Mn2O3 acts as an oxidizer and oxidizes the chlorine from -6 to 0.

How to balance HCl + Mn2O3

Steps to balance the HCl + Mn2O3 reaction:

Step 1: Compare the atoms on both sides of the reaction mechanism

The 4 atoms in this reaction are Mn,H,Cl,O. When we look at the chemical equation, hydrogen having 1 atom on the reactants side and 2 atoms on the products side in the same way Manganese has 2 atoms on the reactant side and 1 atom on the products side. Oxygen has 3 atoms on the reactant side and 1 on the products side.

Mn2O3 + HCl → MnCl2 + Cl2 + H2O

Step 2: Place the Stoichiometric coefficients in front of the unbalanced atoms

Here our first attempt was done by placing 2 as a coefficient of MnCl2 and 2 as a coefficient of HCl.  

Mn2O3 + 2HCl → 2MnCl2 + Cl2 + H2O

Step 3: Placing the required coefficients to get the reaction balanced

 Finally, the reaction gets balanced by placing 6 as the coefficient of HCl and 2 as the coefficient of MnCl2, and 3 as the coefficient of H2O.Therefore, The balanced chemical equation for the reaction of HCl + Mn2O3 is:

Mn2O3 + 6HCl → 2MnCl2 + Cl2 + 3H2O

HCl + Mn2O3 titration

We cannot perform titration for the HCl + Mn2O3 because the formed during the reaction interferes with the reaction to stop further.

HCl + Mn2O3 net ionic equation

The net ionic equation for the reaction of HCl + Mn2O3 is obtained by splitting the electrolytes into ions, canceling the spectator ions, and then combining the ions present in the reaction on the reactants side and products side separately, giving the net ionic equation.

Screenshot 205ss
Net ionic equation

HCl + Mn2O3 conjugate pairs

  • In HCl + Mn2O3 reaction conjugate acid-base pairs are HCl and Cl- ion.
Screenshot 206.ss
Conjugate Pair

HCl and Mn2O3 intermolecular forces

In the reaction of HCl and Mn2O3, HCl has dipole-dipole and London dispersion forces, out of which dipole-dipole interactions are strongest.

dipole dipole 1.webp s 1
Intermolecular forces

HCl + Mn2O3 reaction enthalpy

It is impossible to calculate the enthalpy for the reaction of HCl + Mn2O3 because of the oxidizing nature of Mn2O3

Is HCl + Mn2O3 a buffer solution

The reaction of HCl + Mn2O3 cannot form a buffer solution of the strong acidic character of HCl. A buffer solution is considered for the solutions containing a mixture of a weak acid and its conjugate base.

Is HCl + Mn2O3 a complete reaction

HCl + Mn2O3 is a complete reaction.

Is HCl + Mn2O3 an exothermic or endothermic reaction

We cannot predict the exothermic or endothermic behavior during the reaction of HCl + Mn2O3 because Mn2O3 can oxidize HCl to form chlorine gas.

Is HCl + Mn2O3 a redox reaction

HCl + Mn2O3 is a redox reaction since manganese gets reduced from the +3 to +2 oxidation state; similarly, the chlorine atom oxidizes from the -6 to 0 oxidation state.

Is HCl + Mn2O3 a precipitation reaction

The reaction between HCl + Mn2O3 is not a precipitation reaction, as there is no residue during this reaction.

Is HCl + Mn2O3 reversible or irreversible reaction

HCl + Mn2O3 is not reversible since the products do not undergo any backward reaction under the same conditions.

Is HCl + Mn2O3 displacement reaction

HCl + Mn2O3 is a double displacement reaction as manganese displaces from Mn2O3 to MnCl2 and chloride ion displaces from HCl to MnCl2.

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Displacement reaction


Mn2O3 nanoparticles absorb radionucleotides. Mn2O3 is mainly used in the electrical industry in Lithium-ion-batteries because of its high abundance and low potential. MnCl2 used in the manufacturing of dry-cell batteries. HCl has vast applications in laboratories for production of chlorides.

Read more facts on HCl:

HCl + ZnCO3