Question

A water insluble calcium compound A on reacting with Dillon. H2SO4 released a colourless and odourless gas B with brisk effervescence. When gas B was passed through like water turned milky and again formed compound A. Identify A and B,and writhe the chemical equations for the reactions involved.

Answer 1

A —> CaCO3

B——> CO2

CaCO3+H2SO4—>CaSO4+H2O+CO2

Ca(OH)2+CO2——> CaCO3

Hope this helps ☺️

Answer 2

A is calcium carbonate, as it is insoluble in water

B is Carbon Dioxide, as it turns lime water milky

The reaction :-

CaSO4 + H2SO4 → CaSO4 + H2O + CO2