CaC2 + H2O = Ca(OH)2 + C2H2

Balanced Chemical Equation – Solution

CaC2 + 2H2O → Ca(OH)2 + C2H2

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

Calcium Carbide + Water = Portlandite + Acetylene

Reaction Type

Double Displacement (Metathesis)

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


CaC2 – Calcium carbide

  • Other names: Calcium acetylide.
  • Appearance: White powder to grey/black crystals.

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.


Ca(OH)2 – Calcium hydroxide

C2H2 – AcetyleneEthyne

  • Other names: Ethine.
  • Appearance: Colorless gas.
Similar Examples of Equalizing a Chemical Reaction
H2O + CaC2 → C2H2 + Ca(HO)2
H2O + CaC2 → Ca(OH)2 + C2H2
H2O + CaC2 → CaO + C2H2
H2O + CaC2 → Ca(OH)2 + H2C2
H2O + CaC2 → C2H2 + Ca(OH)2OH2

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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