Question

Calcium carbonate neither exists in the liquid state nor in the gaseous state.
Please give an appropriate answer. The best answer will be appreciated

Answer 1

Answer:

See quick lime (CaO) reacts with water to give Ca(OH)2

i.e. Cao (s) + H2O(l)-------> Ca(OH)2 (aq)

You know that it is used is whitewashing.

When this Ca(OH)2 is applied on the walls then it reacts with CO2 to give Calcium Carbonate and water( which evaporates)

i.e. Ca(OH)2 (aq) + CO2 (g) -------> CaCO3 (s) + H2O (g)

This gives CaCO3 (an insoluble precipitate) which has a shiny surface.

Since water takes time to evaporate,

that's why we wait for 2-3 days for the water to evaporate so that the CaCO3 gives a shiny surface on the walls.

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Answer 2

Answer:

Calcium carbonate is most stable when it is in solid state. It has extremely high melting and boiling points and therefore donot exist as a gas or a liquid in nature.

Hope it helps..

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