1.

A sample of a hydrate of barium chloride weighing 61 g was heated until all the water of hydration is removed. The dried sample weighed 52 g. The formula of the hydrated salt is:(atomic mass, Ba = 137 am u, Cl = 35.5 am u)

Answer»

`BaCl_(2).H_(2)O`
`BaCl_(2).2H_(2)O`
`BaCl_(2).3H_(2)O`
`BaCl_(2).4H_(2)O`

SOLUTION :52 gm `BaCl_(2)`with 9 gm`H_(2)O`.
`((52)/(208))`MOLE of `BaCl_(2)`with `((9)/(18))`moles of `H_(2)O "" :.`1 mole of `BaCl_(2)`with 2 moles of`H_(2)O`


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