Magnesium oxide with the empirical formula MgO is a white hygroscopic solid and hydrogen iodide (HI) is a strong acid. Let us understand the HI + MgO reaction in detail.

The reaction between HI + MgO has a high synthetic application. MgO is a strong electrolyte and hydrogen iodide (HI) is a hydrogen halide is one of the main sources of iodine and a reducing agent utilised in the synthesis of organic and inorganic compounds.

In this article, we will discuss various aspects of HI+MgO reaction like type, titration, and conjugate pair in detail.

What is the product of HI and MgO

Magnesium iodide (MgI₂) and water (H₂O) are produced when HI and MgO react.

MgO + 2HI→ MgI₂ + H₂O

What type of reaction is HI + MgO

MgO + HI can be categorised as a neutralisation reaction.

How to balance HI + MgO

• The general equation of the HI + MgO reaction is as follows: MgO + HI→ MgI₂+H₂O
• The reaction is said to be balanced when the moles of reactant is equal to the moles of product.
• To balance the above reaction 2 moles of HI are added on the reaction side. Hence, the balanced reaction is given by:
• MgO + 2HI → MgI₂+H₂O

HI + MgO titration

HI+MgO titration is an acid-base type of titration.

Apparatus used

Conical flask, burette holder, burette, wash bottle, dropper, volumetric flask, pipette, and beakers.

Titre and titrant

In HI+MgO titration, MgO is titrant, and the titre is HI.

Indicator

Phenolphthalein an acid-base indicator is used in HI+MgO titration

Procedure

• A burette was used to take standardized MgO and HI was taken in a conical flask.
• 1-2 drops of phenolphthalein indicator were added.
• MgO from the burette was added dropwise into the conical flask until the endpoint is attained.
• The process was repeated to obtain three concordant readings.

HI + MgO net ionic equation

Net ionic equation of HI + MgO reaction is MgO + 2H⁺ → Mg²⁺ + H₂O

HI + MgO conjugate pairs

The conjugate pair of the HI+MgO are :

• The conjugate base of HI is I^–.
• The conjugate acid of MgO is OH^–.

HI and MgO intermolecular forces

Intermolecular forces in HI and MgO are as follows:

• The intermolecular forces in MgO are Dipole-dipole and London dispersion forces.
• London forces and dipole-dipole forces are two types of intermolecular forces that HI displays. Although hydrogen bonds are predicted to form, they do not due to iodine’s size and low electronegativity.

Is HI+MgO a buffer solution

HI+MgO will not combine to produce a buffer solution since HI is a strong acid.

Is HI+MgO a complete reaction

The HI+MgO reaction is a complete reaction because the products formed do not undergo any further reaction and are soluble.

Is HI + MgO an exothermic or endothermic reaction

HI+MgO reaction is exothermic and the heat produced will be used as a driving force to complete the reaction.

Is HI + MgO redox reaction

HI+MgO reaction is not a redox reaction because there is no change in the oxidation state of reactants and products.

Is HI + MgO a precipitation reaction

The reaction between HI and MgO is not a precipitation reaction because all products are soluble and don’t lead to the formation of a precipitate.

Is HI + MgO reversible or irreversible reaction

The reaction between HI and MgO is irreversible because the products formed don’t combine to reform reactants.

Is HI + MgO displacement reaction

HI+MgO reaction can be categorized as a double displacement reaction because there is a swapping of ions to form a new product.

 Conclusion

In a nutshell HI+MgO reaction can be classified as an acid-base reaction and a double displacement reaction with negative enthalpy. The product has high industrial importance.