Q. 294.2( 11 Votes )

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.

Class 9th NCERT Science - Exemplar 2. Is Matter Around Us Pure

Answer :

(a) Heating of calcium carbonate to get calcium oxide and carbon dioxide is a chemical change as new substance with different composition and chemical properties are formed.

CaCO₃ (Calcium carbonate) → CaO (Calcium oxide) + CO₂ (Carbon dioxide)(b) Acidic and basic solutions can be prepared by dissolving the products of the above process in water.

When CaO dissolves in water it forms calcium hydroxide which is basic solution.

CaO+H₂O → Ca(OH)₂ (basic solution)

When CO₂(g) dissolves in water it forms carbonic acid which is an acidic solution.

CO₂ + H₂O→H₂CO₃ (acidic solution)

Rate this question :

How useful is this solution?

We strive to provide quality solutions. Please rate us to serve you better.

PREVIOUSCan we separate alcohol dissolved in water by using a separating funnel? If yes, then describe the procedure. If not, explain.NEXTNon-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.(a) Name a lustrous non-metal.(b) Name a non-metal which exists as a liquid at room temperature.(c) The allotropic form of a non-metal is a good conductor of electricity. Name the allotrope.(d) Name a non-metal which is known to form the largest number of compounds.(e) Name a non-metal other than carbon which shows allotropy.(f) Name a non-metal which is required for combustion.