A chemical A is used for the preparation of washing soda to recover ammonia. When CO_(2)is bubbled through an aqueous solution of A, the solution turns milky. It is used in white washing due to disinfectant nature. What is the chemical formula of A?

A chemical A is used for the preparation of washing soda to recover am

1.	A chemical A is used for the preparation of washing soda to recover ammonia. When CO_(2)is bubbled through an aqueous solution of A, the solution turns milky. It is used in white washing due to disinfectant nature. What is the chemical formula of A?
Answer» `Ca(HCO_(3))_(2)` CaO `Ca(OH)_(2)` `CaCO_(3)` Solution :To recover `NH_(3)` is solvay ammonia soda process, `Ca(OH)_(2)`is USED. It is treated with `NH_(4)Cl`. `2NH_(4)Cl+Ca(OH)_(2) to 2NH_(3)+CaCl_(2)+2H_(2)O` On passing `CO_(2)` through `Ca(OH)_(2)`, lime water, which is colourless, turns milky due to the FORMATION of `CaCO_(3)`. `Ca(OH)_(2)CO_(2) to CaCO_(3) darr+H_(2)O` `Ca(OH)_(2)` is used for white washing also.