The lattice energy (U) for MgCl2 is -2540 kJ/mol and the enthalpy of hydration for Mg2+ is -1903 kj/ mol and for Cl is -368 kJ/mol. If the temperature of the solution is increased, what will happen to the solubility and why? The solubility will increase because the enthalpy of solution is exothermic, the solubility will decrease because the enthalpy of solution is exothermic, the solubility will increase because the enthalpy of solution is endothermic, the solubility will decrease because the enthalpy of solution is endothermic, the solubility will not be affected.

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