Question

Hi ! Please help me out !!!


Differentiate between ,

action of heat on sodium carbonate (Na2Co3) and action of heat on Calcium carbonate (Caco3).

It could be of physical and chemical reaction.

No spam ......

​

Answer 1

If anhydrous sodium carbonate is heated, loss in weight — due to dissociation and volatilization — begins at 400° C (752° F). Carbon dioxide is evolved as indicated by the reaction equation. Na2CO3 → Na2O + CO2

Calcium carbonate is strongly heated until it undergoes thermal decomposition to form calcium oxide and carbon dioxide. The calcium oxide (unslaked lime) is dissolved in water to form calcium hydroxide (limewater). Bubbling carbon dioxide through this forms a milky suspension of calcium carbonate

Answer 2

Na2CO3 does not decompose on heating, as it is a stable carbonate.

CaCO3 decomposes CaO and CO2 when heated.

This is the main difference. (question if from Evens' module :-)

Can you see my profile and answer other questions too please?