Balance the equation: CaCO3 + HCl → CaCl2 + H2O + CO2

By BYJU'S Exam Prep

Updated on: September 25th, 2023

The balanced equation is CaCO3 (s) + 2HCl(aq) → CaCl2 (s) + H2O(aq) + CO2(g). In water, calcium carbonate is not particularly soluble. The given chemical equation is an acid-base reaction known as neutralization: HCl is an acid and CaCO3 is a base. Calcium Carbonate + Hydrogen Chloride → Calcium Chloride + Water + Carbon Dioxide

Balanced Chemical Equation

A chemical equation is a way to depict a chemical reaction using different ingredients.

  • A balanced chemical equation is one where the number of atoms in each molecule is the same on both sides of the equation.
  • The chemical equation balancing is controlled by the Law of Conservation of Mass.
  • The entire mass of the molecules or elements existing on the reactant side should match the total mass of molecules or elements present on the product side since, according to this law, mass cannot be generated or destroyed in a chemical reaction.
  • The Law of conservation does not apply if the chemical equation is unbalanced.

Steps: Balance HCl

  • The chemical equation given is:

CaCO3 + HCl → CaCl2 + H2O + CO2

  • To balance the given chemical equation now we have to add 2 moles of HCl on LHS for 1 mole of H2O on RHS.
  • Then we get a balanced chemical equation that is

CaCO3 (s) + 2HCl(aq) → CaCl2 (s) + H2O(aq) + CO2(g)

  • The aforementioned chemical equation is perfectly balanced.


Balance the equation: CaCO3 + HCl → CaCl2 + H2O + CO2

The balanced equation of CaCO3 + HCl → CaCl2 + H2O + CO2 is CaCO3 (s) + 2HCl(aq) → CaCl2 (s) + H2O(aq) + CO2(g). Balancing a chemical equation depends on the law of conservation of mass.

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