CaCO3 + HCl = CaCl2 + H2O + CO2

Balanced Chemical Equation – Solution

CaCO3 + 2HCl → CaCl2 + H2O + CO2

The coefficients show the number of particles (atoms or molecules), and the indices show the number of atoms that make up the molecule. New substances are formed as a result of the rearrangement of the original atoms. As a result of a chemical reaction, atoms of chemical elements do not disappear anywhere and new ones do not appear, their number remains unchanged – this follows from the law of conservation of mass of substances.

Chemical Reaction Information

This is an acid-base reaction (neutralization): CaCO3 is a base, HCl is an acid.

Calcium Carbonate + Hydrogen Chloride = Calcium Chloride + Water + Carbon Dioxide

Reaction Type

Substances that react are called starting materials or reactants. The substances that form as a result are called reaction products.


CaCO3 – Calcium carbonate

  • Other names: Calcite; aragonite; chalk; Lime (material).
  • Appearance: Fine white powder; chalky taste.

HCl – ChloraneHydrogen chloride

  • Other names: Hydrochloric acid.
  • Appearance: Colorless, transparent liquid, fumes in air if concentrated; Colorless gas.


CaCl2 – Calcium chloride

  • Other names: Calcium(II) chloride, Calcium dichloride.
  • Appearance: White powder, hygroscopic.

H2O – Water, oxidane

  • Other names: Water (H2O), Hydrogen oxide, Hydrogen hydroxide.
  • Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas.


  • Names: Carbon dioxide
  • Appearance: Colorless gas
Similar Examples of Equalizing a Chemical Reaction
HCl + MnO2 + Fe2O3 + CaCO3 → H2O + Cl2 + CO2 + CaCl2 + FeCl3 + MnCl2
HCl + CaCO3 → H2O + CO2 + CaCl2
HCl + CaCO3 + MgCO3 → CO2 + CaCl2 + Mg(OH)2
HCl + CaCO3 + Mg(OH)2 → H2O + CO2 + CaCl2 + MgCl2
HCl + CaCO3 + MgCO3 → H2O + CO2 + CaCl2 + MgCl2
HCl + CaCO3 → CaCl2 + H2CO3
HCl + CaCO3 + MgCO3 → H2O + H2 + CO2 + CaCl2 + MgCl2
HCl + CaCO3 + CaO → H2O + CO2 + CaCl2

Alexander Stephenson

Candidate of Chemical Sciences, editor-in-chief of Lecturer at several international online schools, member of the jury of chemistry competitions and author of scientific articles.

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