Question & Answer » Chemistry Questions » CaO + H2O → CaOH2 is an Example of a ________ Reaction

CaO + H2O → CaOH2 is an Example of a ________ Reaction

Answer: The formation of calcium hydroxide CaOH2 from calcium oxide (CaO) and water (H2O) is an exothermic combination reaction.

  • Combination reaction:

A combination reaction is one in which two or more reactants combine to generate a single product.

General form of combination reaction is: X + Y → XY

A synthesis reaction is another name for a combination reaction. Calcium hydroxide is formed when calcium oxide (commonly known as quick lime) mixes with water (commonly known as slaked lime).