write the chemical name and chemical formula of the salt used to remove permanent hardness of water?
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Washing soda (NA2CO3.10H2O): Recrystallization of sodium carbohydrate gives washing soda. its a basic salt.
NA2CO3+10H2O=NA2CO3.10H2O
USES
1 for removing permanent hardness of water
2 manufacturing of borax
3 in glass soap and paper industry
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