how to metal carbonate and metal hydrogen carbonate react with acid ? Taking sodium as metal, write the balanced chemical equation in both the cases. State the method to test the gas involved in this reaction

FORMULA :- Metal carbonate/metal hydrogen carbonate+ acid ----------> salt + carbondioxide + hydrogen.

SODIUM HYDROGEN CARBONATE WITH ACID:- NaHCO3 + HCL---------> Nacl+ Co2 +H20. SODIUM CARBONATE WITH ACID:- Na2CO3 + 2HCL------> 2Nacl + Co2 + H2O.

How to test CO2 in the both cases:- Pass the evolved gas in quick lime it will turn to milky white slaked lime water.