The stability of a solute decreases with increase in temperature if dissolution is________.
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The solubility of a solute decrease with temperature when dissolution is exothermic.
e.g., CaCl
2
,Ca(OH)
2
,(CH
3
COO)
2
Ca,NaOH,KOH etc.
Ca(OH)
2
(s)+aq→Ca(OH)
2
(aq)+Qkcal.
Since heat is evolved, with increase in the temperature, the equilibrium shifts in the reverse direction so as to nullify the effect of increased temperature. Hence, the solubility decreases.
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