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Determine the precentage of water of cry...

Determine the precentage of water of crystallisation in pure sample of green vitriol `(FeSO_(4).7H_(2)O)`

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The correct Answer is:
0.4532
Molecular mass of `FeSO_(4).7H_(2)O=56+32+64+126=278.0u`
`:.` Percentage of water of crystallisation `= ((126u))/((278u))xx100=45.32%`.
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