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On heating 1.763 g of hydrated BaCI2 to ...

On heating 1.763 g of hydrated `BaCI_2` to dryness, 1.505g of anhydrous salt is left. What is the formula of hydrated salt?

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`underset(208+18n)(BaCl_2.nH_2O)rarrunderset(208)BaCl_2`
(208+18n)g of `BaCl_2.nH_2O` gives 208g of `BaCl_2 = 208/(208+18n) xx 1.63 = 1.505 `
n = 2, therefore formula of hydrated salt is `BaCl_2.2H_2O`
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