H_{2}SO_{4} + CaCO_{3 }is the reaction between limestone and sulphuric acid to form lime, carbon dioxide as the gas and water molecule. Let us discuss in details below.

**H _{2}SO_{4} is an acid and CaCO_{3 }is soluble in dilute acids. CaCO_{3 }has very low solubility in water with low boiling point that easily decomposes and it is endothermic in nature. It is found in minerals and rocks. The presence of CaCO_{3} is the result of water becoming hard and causes hair fall and digestive issues.**

H_{2}SO_{4} + CaCO_{3 }is widely studied for the formation of lime. Let us study about the type of reactions, nature, net reactions etc. of H_{2}SO_{4} + CaCO_{3 }below.

## What is the product of H2SO4 and CaCO_{3}?

**The product of H _{2}SO_{4} and CaCO_{3 }is H_{2}CO_{3 }and CaSO_{4. }The bicarbonate H_{2}CO_{3}_{ }further breaks down in H_{2}O and CO_{2}.**

**H**_{2}**SO**_{4}**+ CaCO**_{3 }**-> H**_{2}**CO**_{3 }**+ CaSO**_{4}

## What type of reaction is H_{2}SO_{4} + CaCO_{3}?

**The type of reaction between H _{2}SO_{4} + CaCO_{3 }is a neutralization reaction as the reaction produces calcium sulphate ( CaSO_{4}** )

**as the salt and water.**

## How to balance H_{2}SO_{4} + CaCO_{3}?

**The steps required to balance H _{2}SO_{4} + CaCO_{3} for the reaction H_{2}SO4 + CaCO_{3 }-> H_{2}CO_{3 }+ CaSO_{4} are as follows**,

**O and H are always balanced last.****Balance the main group elements Ca on both sides****Balance S and C atoms on both sides.****The above reaction has an already balanced atoms on both left and right sides of the equation.****Therefore, the balanced chemical equation of H**,_{2}SO_{4}+ CaCO_{3}is**H**_{2}SO_{4}+ CaCO_{3 }-> H_{2}O+ CaSO_{4 }+ CO_{2}.

## H_{2}SO_{4} + CaCO_{3 }titration

**H _{2}SO_{4} + CaCO_{3} reaction cannot be titrated because of them being strong acid and strong base.**

## H_{2}SO_{4} + CaCO_{3 }net ionic equation

**H _{2}SO_{4} + CaCO_{3} reaction has the net ionic reaction,**

**H _{2}SO4 + CaCO_{3 }-> H_{2}CO_{3 }+ CaSO_{4 }is 2H^{+} (aq) + SO_{4}^{2- }(aq) + CaCO_{3 }(s) -> 2H^{+} (aq) + CO_{3}^{2-} (aq) + CaSO_{4 }(s)**

**Write the complete molecular reaction.****Mention the states of the molecules / compounds.****Break the electrolytes or ionic molecules in aqueous medium in to the respective ions.**

## H_{2}SO_{4} + CaCO_{3 }conjugate pairs

**The conjugate pairs of H**_{2}SO_{4}+ CaCO_{3 }are H^{+}, SO_{4}^{2-}, Ca^{2+}and CO_{3}^{2-}.**It is the cations (H**^{+}, Ca^{2+}) and anions (SO_{4}^{2}, CO_{3}^{2-})that form radical pairs in a molecule.

## H_{2}SO_{4} and CaCO_{3 }intermolecular forces

**H _{2}SO_{4} + CaCO_{3} reaction has the following intermolecular forces,**

**The intermolecular forces of attraction existing H**_{2}SO_{4}and CaCO_{3 }are electrostatic forces.**The cations and anions in respective molecules of H**_{2}SO_{4}and CaCO_{3}are held together by strong electrostatic forces.

## H_{2}SO_{4} + CaCO_{3 }reaction enthalpy

**The exact enthalpy of H _{2}SO_{4} + CaCO_{3 }is not yet measured but it is an exothermic reaction so the enthalpy would be negative.**

## Is H_{2}SO_{4} + CaCO_{3 }a buffer solution?

**H _{2}SO_{4} + CaCO_{3 }is not a buffer solution as it is not formed by reacting weak acid and its conjugate base or by reacting weak base with its conjugate acid.**

## Is H_{2}SO_{4} + CaCO_{3 }a complete reaction?

**H _{2}SO_{4} + CaCO_{3 }is not a complete reaction. The reaction can be called a complete reaction if both the left and right-hand side of the chemical equation is present.**

## Is H_{2}SO_{4} + CaCO_{3 }an exothermic or endothermic reaction?

**H _{2}SO_{4} + CaCO_{3 }is an exothermic reaction as the heat released from the formation of water is higher than if being absorbed.**

## Is H_{2}SO_{4} + CaCO_{3 }a redox reaction?

**H _{2}SO_{4} + CaCO_{3 }is not a redox reaction as the oxidation states of any of the elements do not change upon reaction. Neither H_{2}SO_{4} nor CaCO_{3} acts as an oxidizing or reducing agent.**

## Is H_{2}SO4 + CaCO_{3 }a precipitation reaction?

**H _{2}SO4 + CaCO_{3 }is a precipitation reaction as it forms insoluble CaSO_{4 }salt. **

## Is H_{2}SO_{4} + CaCO_{3 }reversible or irreversible reaction?

**H _{2}SO_{4} + CaCO_{3 }is an irreversible reaction. The reaction does not proceed backward to form the reactants. The salt once formed stops the reaction from reaching equilibrium.**

## Is H_{2}SO_{4} + CaCO_{3 }displacement reaction?

**H _{2}SO_{4} + CaCO_{3 }is a double displacement reaction as can be verified from its chemical equation.**

**H**_{2}SO_{4}+ CaCO_{3 }-> H_{2}CO_{3 }+ CaSO_{4}**H**_{2}CO_{3 }-> H_{2}O + CO_{2}

**Conclusion**

H_{2}SO_{4} + CaCO_{3 }is a neutralization reaction showing double displacement of the elements upon reaction. It is a precipitation reaction that forms calcium sulphate as the salt that precipitates out. The reaction is displaced twice to form its compunds.

Hello…. I am Nandita Biswas. I have completed my master’s in Chemistry with a specialization in organic and physical chemistry. Also, I have done two projects in chemistry- One dealing with colorimetric estimation and determination of ions in solutions. Others in Solvatochromism study fluorophores and their uses in the field of chemistry alongside their stacking properties on emission. I am working as a Research Associate Trainee in Medicinal Department.

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