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Find the mass percentage of watr of hydr...

Find the mass percentage of watr of hydration in blue vitrio `(Cu SO _(4), 5H_(2)O).` [Given the atomic masses, `Cu = 63.6, S = 32, H = 1, and O = 16]`

Text Solution

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Molecular mass
`=1 xx 63.6 + 1 xx 32 + 4 xx 16 + 5 ( 2 + 16)`
`= 63.6 + 32 + 64 + 90 = 249 . 6 ~~ 250`
Gram molecular mass = 250 g
Massof water of hydration in 250 g of blue vitriol
`=5 xx 18 = 90 g`
Percentage of water of hydration by mass
`= (90)/(250) xx 100 = 36. 00`
Percentage of water of hydration in blue vitriol = 36. 00
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