crystalline salt any to Na2SO4.xH2O on heating looses 55.9 % of its mass and become an anhydrous find the formula of crystalline salt
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Na2SO4.xH2O
The molecular mass = 46 + 32 + 64 + 18x = 142+18x
The mass of anhydrous salt = 142
Given 18x * 100/ (142+18x) = 55.9
1800x = 7937.8 + 1006.2 x
x = 7937.8/793.8 = 10
Therefore the compound is Na2SO4.10H2O
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