1.

A chemical compound X is used in the soap and glass industry. It is prepared from brine. What happens when it is treated with water containing Ca or Mg salts ?

Answer»

Solution :It removes PERMANENT HARDNESS of water which is due to the presence of CALCIUM and MAGNESIUM salts.
`CaCl_(2) + Na_(2)CO_(3) rarr CaCO_(3) + 2NaCl`


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