A divalent metal salt X, which contributes to hardness of water, combines with washing soda and forms an insoluble salt Y and common salt. Salt Y is also used for the laboratory preparation of CO_(2). Identify X and Y respectively.

A divalent metal salt X, which contributes to hardness of water, combi

1.	A divalent metal salt X, which contributes to hardness of water, combines with washing soda and forms an insoluble salt Y and common salt. Salt Y is also used for the laboratory preparation of CO_(2). Identify X and Y respectively.
Answer» `CaSO_(4), CaCO_(3)` `MgSO_(4), MgCO_(3)` `CaCl_(2), CaCO_(3)` `MgCl_(2), MgCO_(3)` Solution :Divalent metal salt X which contributes to hardness of water is `CaCl_(2)` which combines with `Na_(2)CO_(3)`gives insoluble salt Y that is calcium CARBONATE and sodium chloride. `CaCl_(2)+Na_(2)CO_(3)rarrCaCO_(3)darr+2NaCl`