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A hydrate of Na(2)SO(3) has 50% water by...

A hydrate of `Na_(2)SO_(3)` has 50% water by mass. It is

A

`Na_(2)SO_(3).5H_(2)O`

B

`Na_(2)SO_(3).6H_(2)O`

C

`Na_(2)SO_(3).7H_(2)O`

D

`Na_(2)SO_(3).2H_(2)O`

Text Solution

Verified by Experts

The correct Answer is:
C
50% water `rArr` Mass of water = Mass of `Na_(2)SO_(3) = 126g`
`rArr` Moles of water `(126)/(18) = 7 rArr` Formula is `Na_(2)SO_(3).7H_(2)O`
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