A solution of a substance X is used for white washing. Name the substance X and write its formula. Write the reaction of the substance X named in above with water.

Reaction of Wuicklime with Water

• Calcium oxide is the chemical that is used in white washing.
• Calcium hydroxide is created when calcium oxide and water react (Lime water).
• This creates calcium carbonate by absorbing the carbon dioxide already present in the environment.
• On the walls, this calcium carbonate hardens into a layer.

The correct answer is:

CaO (s) + H2O (l) → Ca(OH)2 (aq)

Calcium oxide + Water → Calcium hydroxide

Ca(OH)2 (aq) + CO2 (g)→ CaCO3 (s) + H2O(l)

Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water

Consequently, (CaO) calcium oxide is the substance X.

Summary:

A solution of a substance X is used for white washing. Name the substance X and write its formula. Write the reaction of the substance X named in above with water.

For white washing, a solution of material X is employed. Calcium carbonate, sometimes known as X, has the chemical formula CaO. The above-mentioned material X reacts with water in the following way:

Ca(OH)2 (aq) + CO2 (g)→ CaCO3 (s) + H2O(l)

Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water