Question

how do metal carbonates and metal hydrogen carbonates react with acids ? give their chemical equations . name the gas evolved during the reaction. what will happen when this gas is passed through lime water

Answer 1

When metal carbonate and metal hydrogen carbonate reacts with the acid it's gives salt, carbon dioxide and water.
Na2Co3+2HCl= 2NaCl+H2O+CO2
Na2HCO3+HCl= NaCl+H2O+CO2
The has evolved during this reaction is the carbon dioxide
When carbon dioxide is passed into the lime water gives a Milky solution due to the pricipitation of an insoluble suspension of the calcium carbonate

Answer 2

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