The crysalline salt, Na(2)SO(4).xH(2)O o...

The crysalline salt, `Na_(2)SO_(4).xH_(2)O` on heating loses 55.9% of its weight. The formula of crystalline salt is

`Na_(2)SO_(4).5H_(2)O`

`Na_(2)SO_(4).7H_(2)O`

`Na_(2)SO_(4).10H_(2)O`

`Na_(2)SO_(4).6H_(2)O`

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