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Explanation:

Calcium hydroxide is produced commercially by treating lime with water: CaO + H2O → Ca(OH) In the laboratory it can be prepared by mixing aqueous solutions of calcium chloride and sodium hydroxide.

Quicklime is used for whitewashing as it produces calcium hydroxide (CaOH) when it reacts with water (H2O) and absorbs carbon dioxide (CO2) from the environment, as a result, it produces calcium carbonate (CaCO3) which creates a hard coating on the walls.

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Calcium hydroxide is prepared through the treatment of lime with water: This is often don in the laboratory.

CaO + H2O → Ca(OH) is often prepared in the lab by the mixture of aqueous solutions of calcium chloride to sodium hydroxide.

Why is calcium hydroxide used in white washing?

A solution of calcium hydroxide (slaked lime) is often used for whitewashing walls.

This is because Calcium hydroxide is known to often reacts a little slower with the carbon dioxide in the air to form a kind of a thin layer of calcium carbonate on the walls.

Note that Calcium carbonate is produced after days of whitewashing and it is said to produce a shiny touch to any walls.

Learn more about CaO from

https://brainly.com/question/1543027

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