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Why the solubility of Glauber,s salt (Na...

Why the solubility of Glauber,s salt `(Na_(2)SO_(4)10 H_(2)O)` first increases up to `32.4^(@)C` and then decreases ?

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Upto `32.4^(@)C`, Glauber's salt remains in the hydrated form whose dissolution is endothermic. Hence, its solubility increases with temperature. Beyond `32.4^(@)C`, it changes into anhydrous salt whose dissolution is exothermic. Hence, solubility decreases with increase of temperature.
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