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Decomposition of a hydrated form of Na(...

Decomposition of a hydrated form of `Na_(2)CO_(3)` cause approximately 63% loss in its mass on strong heating. If the heating only cause removal of water of crystallization then formula of the hydrated salt is

A

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

B

`Na_(2)CO_(3).10H_(2)O`

C

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

D

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

Text Solution

Verified by Experts

The correct Answer is:
B
In `Na_(2)CO_(3).10H_(2)O` , % by mass of `H_(2)O = (180)/(286) xx 100 = 63%` (approx)
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