A metal carbonate X on treatment with a mineral acid liberates a gas which when passed through aqueous solution of a substance Y gives back X. The substance Y on reaction with the gas obtained at anode during electrolysis of brine gives a compound Z which can decolorise coloured fabrics. Name the compounds X,Y and Z ?

Asked by rushabh123 | 14th Mar, 2019, 10:57: AM

Expert Answer:

A metal carbonate X on treatment with a mineral acid liberates a gas which when passed through an aqueous solution of a substance Y gives back X.
 
CaCO subscript 3 subscript open parentheses straight s close parentheses end subscript space space end subscript space plus space 2 HCl space rightwards arrow space CaCl subscript 2 subscript open parentheses straight g close parentheses end subscript space plus space space CO subscript 2 subscript open parentheses straight g close parentheses end subscript end subscript space plus space straight H subscript 2 straight O subscript open parentheses straight l close parentheses end subscript
space space open parentheses straight X close parentheses

Ca open parentheses OH close parentheses subscript 2 space space plus space space CO subscript 2 space space rightwards arrow CaCO subscript 3 space space plus space straight H subscript 2 straight O
open parentheses space straight Y close parentheses space space space space space space space space space space space space space space space space space space space space space space space space space space space space space open parentheses straight X close parentheses
 
 
Chlorine gas is obtained at the anode during electrolysis of brine.
 
The substance Y on reaction with the Cl2 gas obtained at the anode during electrolysis of brine gives a compound Z.
 
Ca open parentheses OH close parentheses subscript 2 space plus space Cl subscript 2 space space rightwards arrow space CaOCl subscript 2 space plus space space straight H subscript 2 straight O space
left parenthesis straight Y right parenthesis space space space space space space space space space space space space space space space space space space space space space space space space space space space space space left parenthesis straight Z right parenthesis
 
The compound X is CaCO3 
 
The compound y is Ca(OH)2 
 
The compound Z is CaOCl2
 

Answered by Varsha | 14th Mar, 2019, 03:23: PM