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  • On heating, calcium carbonate gets converted into calcium oxide and carbon dioxide. (a) Is this a physical or a chemical change? (b) Can you prepare one acidic and one basic solution by using the products formed in the above process?

On heating, calcium carbonate gets converted into calcium oxide and carbon dioxide.
(a) Is this a physical or a chemical change?
(b) Can you prepare one acidic and one basic solution by using the products formed in the above process? If so, write the chemical equation involved.

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Solution:
If a matter goes under a physical change its appearance might change but the substance of matter does not change.
In a chemical change in a chemical change either one of the substance changes and comes with new properties.
CaCO_{3}\rightarrow CaO+CO_{2}
(a) It is a chemical change as new substances are formed.
(b) Calcium oxide when dissolved in water, forms a basic solution.

CaO + H_{2}O \rightarrow Ca(OH)_{2}
Carbon dioxide when dissolved in water, forms an acidic solution
CO_{2}+H_{2}O\rightarrow H_{2}CO_{3}

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