Question

write the chemical name and chemical formula of the salt used to remove permanent hardness of water?​

Answer 1

__________Answer is in the image

Answer 2

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