The heat of solution of calcium chloride is -121 kj/mol. given that the lattice energy of calcium chloride is -2258 kj/mol and the heat of hydration of a chloride ion is -338 kj/mol calculate the heat of hydration of a calcium ion.

Heat of hydration of calcium ion is -1703 kJ/mol

Explanation:

Dissolution equilibrium of calcium chloride:

Where is heat of solution, is heat of hydration and U represents lattice energy.

Here, = -121 kJ/mol, = -338 kJ/mol and = -2258 kJ/mol

So, plug-in all the given values in the above equation-

So,

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