15 Facts on HCl + BaCO3: What, How To Balance & FAQs

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BaCO3 is an alkali metal carbonate and HCl is an inorganic acid. Let us explore how these two compounds are reacting to each other.

HCl, a strong mineral acid, reacts with BaCO3, a basic salt leading to the formation of a salt and acid first. The product acid is immediately decomposed into a gas and a liquid.

This article will furnish some idea about all the crucial characteristics of the reaction between HCl and BaCO3.

What is the product of HCl and BaCO3

Barium chloride (BaCl2), carbon dioxide (CO2), and water (H2O) are the products of the reaction HCl + BaCO3. Carbonic acid (H2CO3), an unstable compound, readily decomposes into carbon dioxide and water. The reaction is shown below.

Screenshot 2022 11 24 092719
The reaction between HCl and BaCO3

What type of reaction is HCl + BaCO3

HCl + BaCO3 falls under the type of double displacement reaction.

How to balance HCl + BaCO3

The unbalanced equation for the reaction HCl + BaCO3 is

HCl + BaCO3 = BaCl2 + CO2 + H2O

Below are the steps that should be followed to get the balanced equation

  • The number of Ba, C, and O atoms on left hand side and right hand side is same.
  • HCl + BaCO3 = BaCl2 + CO2 + H2O
  • The number of H and Cl atoms, on left hand side and right hand side is 1 and 2 respectively.
  • HCl  +  BaCO3  = BaCl2 + CO2 + H2O
  • We will multiply HCl with 2 so that number of H and Cl atoms becomes same.
  • Finally, the balanced equation is as follows.
  • 2HCl + BaCO3 = BaCl2 + CO2 + H2O

HCl + BaCO3 titration

To determine the amount of the poorly insoluble salt BaCO3 by HCl, we have to do back titration.

Apparatus

Pipette, volumetric flask, conical flask, measuring cylinder, burette, and titration stand

Indicator

Phenolphthalein is used as indicator in this titration procedure.

Procedure

  • Take BaCO3 sample in a conical flask and HCl (known volume and concentration) was added using a pipette.
  • Mix it properly and add a few drops of indicator.
  • Titrate the excess HCl with NaOH solution of known concentration from a burette till the color changes to light pink.
  • Repeat the procedure 2-3 times to avoid errors and note down the burette reading.
  • Finally, using the formula S1V1 = S2V2, the amount of unreacted HCl can be found.
  • From the amount of HCl reacted with BaCO3, the amount of BaCO3 can be determined.

HCl + BaCO3 net ionic equation

The net ionic equation for the reaction HCl + BaCO3 is

CO32− (aq) + 2H+ (aq) → H2O (l) + CO2 (g)

To derive the net ionic equation, follow the below steps.

  • Soluble ionic compounds can dissociate into cations and anions.
  • HCl, BaCO3, and BaCl2 being ionic, can be written as cations and anions.
  • 2H+ (aq) + 2Cl− (aq) + Ba2+ (aq) + CO32− (aq) = Ba2+ (aq) + 2Cl− (aq) + H2O (l) + CO2 (g)
  • Finally, after canceling the spectator ions from both sides, we can get the net ionic equation.

HCl + BaCO3 conjugate pairs

In the reaction HCl + BaCO3,

  • The conjugate base of the acid HCl is Cl–.
  • For BaCO3, conjugate pair is not possible.

HCl + BaCO3 intermolecular forces

  • HCl molecule has two intermolecular forces; dipole-dipole and London dispersion forces. Dipole-dipole interaction is more significant because of its polar nature.
  • BaCO3 being ionic in nature has electrostatic force of attraction.

HCl + BaCO3 reaction enthalpy

The reaction enthalpy value for the reaction HCl + BaCO3 is -2.0 kJ/mole. It is calculated as follows.

CompoundsEnthalpy of formation (kJ/mole)
HCl (aq)-167.2
BaCO3 (aq)-1214.8
BaCl2 (aq)-871.9
CO2 (g)-393.5
H2O (l)-285.8
Enthalpy of formation values of all compounds

Change in Enthalpy = (enthalpies of formation of all products) – (enthalpies of formation of all reactants)

= [(-871.9) + (-285.8) + (-393.5)] – [2*(-167.2) + (-1214.8)]

= -2.0 KJ/mol.

Is HCl + BaCO3 a buffer solution

HCl + BaCO3 cannot produce a buffer solution because HCl is a strong acid, and BaCO3 does not contain the conjugate base of HCl.

Is HCl + BaCO3 a complete reaction

HCl + BaCO3 is a complete reaction as the acid HCl reacts completely with the salt BaCO3.

Is HCl + BaCO3 an exothermic or endothermic reaction

HCl + BaCO3 is exothermic in nature, which is clear from the calculation of reaction enthalpy -2.0 kJ/mole.

Is HCl + BaCO3 a redox reaction

HCl + BaCO3 cannot be called a redox reaction because the oxidation states of the atoms of the reactant and product molecules are unchanged.

Is HCl + BaCO3 a precipitation reaction

HCl + BaCO3 is not a precipitation reaction because the product BaCl2  is a water-soluble solid, CO2 is a gas, and H2O is liquid.

Is HCl + BaCO3 reversible or irreversible reaction

HCl + BaCO3 is an irreversible reaction as the reaction does not proceed back to the left-hand side once the products are formed.

Is HCl + BaCO3 displacement reaction

HCl + BaCO3 is a displacement reaction as ions are swapped between two reactants BaCO3 and HCl.

Conclusion

In conclusion, the final products are BaCl2, CO2, and H2O when hydrochloric acid reacts with barium carbonate. BaCl2 is a water-soluble white solid, and CO2 is a colorless, non-flammable gas. The reaction is an example of a double displacement reaction.