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Earlier discussion
3 older comments kept for context.
Chijioke Johnpaul
The answer should be be cos when a rxn is exothermic ie heat is evolved. An increase in temperature will favour the backward while a decrease in temperature favour the forward reaction
Uche Emmanuel
This is actually wrong because any substance that dissolves with liberation of heat,it means that the reaction is exothermic so therefore solubility decreases with increase in temperature and vice versa
Oluwaseun Adeyemi
For many solids dissolved in liquid water, the solubility increases with temperature. The increase in kinetic energy that comes with higher temperature allows the solvent molecules to more effectively break apart the solute molecules that are held together by intermolecular attractions.