Question

a compound ‘x’ reacts with dilute hcl and forms a gas ‘y’. then the gas ‘y’ reacts with compound ‘z’ and forms compound ‘x’ back. identify x, y and z. write all the reaction involved in it​

Answer 1

 X is carbon dioxide gas, Y is calcium carbonate and Z is calcium hydrogen carbonate.

(b). (i) CaCO3+2HCl→CaCl2+H2O+CO2

     (ii) Ca(OH)2(aq)+CO2(g)→CaCO3(s)+H2O(l)

     (iii) CaCO3(s)+CO2(g)+H2O(l)→Ca(HCO3)2(aq)