Question

Q.4 How do metal carbonates and metal hydrogen carbonates react with acids?

Taking sodium as metal, write balanced chemical equations in both the cases.

State the method to test the gas evolved in the reactions.​

Answer 1

Answer:

Metal carbonates and metal hydrogen carbonates reacts with acid and give brisk effervesence of carbon dioxide gas.

Case 1

Using of sodium carbonate

Na2CO3+ 2HCl= 2NaCl+CO2+ H2O

Case 2

Using of sodium hydrogen carbonate

NAHCO3+HCl=NaCl+CO2+H2O

Testing of gas can be done by passing the gas into lime water and which turns milky due to the formation of calcium carbonate.

Ca(OH)2+CO2=CaCO3+H2O...

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Answer 2

Answer:

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