Question

when water is added to A of calcium solutions of a compound B is formed When Co2 is passed into the solution it turns milky due to the formation of compound C . If excess of Co2 is passed into the solution milkiness disappears due to the formation of a compound D. identify A,B,C,D. Why the milkiness disappears in last step?

Answer 1

Ais ca(oh)2
bis cao
andc is ca(oh)2
and D is ca(hco3)2

Answer 2

Milkiness disappears due to the formation of Ca(HCO3)2 which is soluble in water.