# 15 Facts on H2SO4 + Mg: What, How To Balance & FAQs

Magnesium (Mg), an alkaline earth metal, is highly reactive, and H2SO4 (sulfuric acid) is a strong inorganic acid. Let us examine their reaction in detail.

The reaction between Mg and H2SO4 is highly vigorous. Magnesium is a reactive metal that exists in +2 oxidation state in its ionic form, is found in chlorophyll pigment, and plays a vital role in the proper functioning of the human body. H2SO4 is a strong dehydrating agent.

Here, we will discuss the reaction products, forces involved, buffer solution, and other parameters of H2SO4 and Mg deeply.

## What is the product of H2SO4 and Mg

MgSO4 (Magnesium sulfate) and hydrogen gas are the products of the reaction H2SO4 + Mg.

H2SO4 + Mg → MgSO4 + H2

## What type of reaction is H2SO4 + Mg

H2SO4 + Mg is a single displacement reaction.

## How to balance H2SO4 + Mg

The equation H2SO4 + Mg is balanced through the following steps

H2SO4 + Mg → MgSO4 + H2

• The elements involved in the reaction are identified and counted. Mg, H, S, and O are the elements that are present in the substituents.
• Here the elements are balanced both in the reactant and product side. Thus the balanced equation is
• H2SO4 + Mg → MgSO4 + H2

## H2SO4 + Mg titration

H2SO4+Mg will not undergo titration as Mg being a metal will not be used in the titration.

## H2SO4 + Mg net ionic equation

The net ionic equation of H2SO4+Mg is

2H+ (aq) + Mg(s) → Mg2+(aq) + SO42-(aq)+ H2(g)

The net equation is derived using the given steps

• The balanced equation deduced earlier is written.
• H2SO4 + Mg → MgSO4 + H2
• The states of the reactants and the products are shown.
• H2SO4(aq) + Mg(s) → MgSO4(aq)+ H2(g)
• The electrolytes(strong) are split into their respective ions. Mg is a solid and H2 is a gas so will not split. The equation now becomes
• 2H+ (aq) +SO42-(aq) + Mg(s) → Mg2+(aq) + SO42-(aq)+ H2(g)
• The spectator ions are canceled out and the net ionic equation is
• 2H+ (aq) + Mg(s) → Mg2+(aq) + SO42-(aq)+ H2(g)

## H2SO4 + Mg conjugate pairs

H2SO4 + Mg is not a conjugate pair as they do not conjugate to form the desired acid-base pair.

• SO42- is the conjugate base of H2SO4 (acid).
• Mg is metal so there is no conjugate pair for Mg.

## H2SO4 and Mg intermolecular forces

• Hydrogen bonding, dispersion forces, and dipole-dipole interactions are the intermolecular forces found in the H2SO4 molecule.
• Metallic bonding is present in Mg as it is a metal.

## H2SO4 + Mg reaction enthalpy

H2SO4 + Mg reaction enthalpy is -466.85 KJ. The enthalpy will be calculated using the values listed below,

• The enthalpy of the elements or the molecule present in their original state is taken as zero.
• ∆Hf°(reaction) = ∆Hf°(products) – ∆Hf°(reactants)

= -1376.12 – (-909.27)

= -466. 85 KJ

## Is H2SO4 + Mg a buffer solution

The combination H2SO4 + Mg will not function as a buffer solution due to the presence of metal and the use of a strong acid (H2SO4).

## Is H2SO4 + Mg a complete reaction

H2SO4 + Mg is a complete reaction as the products will not react further since one of them is a gas that gets evolved during the reaction.

## Is H2SO4 + Mg an exothermic or endothermic reaction

H2SO4 + Mg is an exothermic reaction as a large amount is heat is liberated during the reaction. The enthalpy of the reaction is negative too.

## Is H2SO4 + Mg a redox reaction

H2SO4 + Mg is a redox reaction where,

• Magnesium is getting oxidized from zero to +2 oxidation state.
• Hydrogen is reduced from a +1 to a zero oxidation state.

## Is H2SO4 + Mg a precipitation reaction

Mg + H2SO4 is not a precipitation reaction as the products formed are completely soluble without the formation of any precipitate.

## Is H2SO4 + Mg reversible or irreversible reaction

Mg + H2SO4 is an irreversible reaction as the forward reaction is more feasible due to the increase in entropy attributed to the liberation of a gaseous product.

## Is H2SO4 + Mg displacement reaction

Mg + H2SO4 is a single displacement reaction as Mg is more reactive so it will displace the hydrogen from its sulfate salt and forms Magnesium sulfate.

H2SO4 + Mg → MgSO4 + H2

#### Conclusion

The reaction was found to be exothermic and with positive entropy. MgSO4 generally called as Epsom salt, has a wide application in the field of healthcare, used in magnesium deficiency and asthma. The deficiency of magnesium causes weakening of bones and muscles.

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