1.

What happens when : (i) Concentrated H_(2)SO_(4) is added to calcium fluoride, (ii) SO_(3) is passed through water ?

Answer»

Solution :(i) `H_(2)SO_(4)` being less volatile displaces more volatile HF from `CaF_(2)`.
`CaF_(2) + H_(2)SO_(4) rarr CaSO_(4) + 2 HF`
(ii) `SO_(3)` DISSOLVES in water to FORM `H_(2)SO_(4)`
`SO_(3) + H_(2)O rarr H_(2)SO_(4)`.


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