Question

White wash was being done at mukesh's house. mukesh saw that the painter added quick lime to drum having water. mukesh touched outer sur face drum, it is unbelievably hot write the chemical equation for above reaction. what type of reaction is it? what is utility of this reaction?

Answer 1

This is a combination reaction ,
CaO + H2O ----> Ca(OH)2

Quicklime that is calcium oxide when reacts vigorously with water, produces slaked lime that is calcium hydroxide and a large amount of heat is also released this is also known as slaking of lime.


Slaked lime is used to white wash the walls.
Slaked lime when apply towards reacts slowly with carbon dioxide present in air to form a Shiny thin layer of calcium carbonate on the walls.

The chemical formula of marble is also calcium carbonate.


_______I hope it helps you______