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Enthalpy of Solution

nbsp;Calculat...

Question

Calculate the percentage composition of water of crystallisation in the following compounds -
I. FeSO_{4 .}7H₂0

II. Na₂B₄O₇ . 10H₂O

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Solution

FeSO_{4 .}7H₂O
Mass of FeSO₄.7H₂O = 278 g
Mass of water of crystallization (7H₂O) = 7 x 18 = 126 g
Therefore, percentage composition of water of crystallization = 126/278 x 100
= 45.32 %

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