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Problem: Potassium perchlorate (KClO4) has a lattice energy of -599 kJ/mol and a heat of hydration of -548 kJ/mol.Find the heat of solution for potassium perchlorate when 10.6 g of potassium perchlorate is dissolved with enough water to make 110.1 mL of solution.

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  • We have to calculate the heat of solution when 10.6 g potassium perchlorate is dissolved in water.


Heat of solution is the energy absorbed or released when a solid is dissolved in a solvent to form a solution.

The heat of solution is calculated by this formula:

H°solution = H°hydration - H°lattice

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Problem Details

Potassium perchlorate (KClO4) has a lattice energy of -599 kJ/mol and a heat of hydration of -548 kJ/mol.

Find the heat of solution for potassium perchlorate when 10.6 g of potassium perchlorate is dissolved with enough water to make 110.1 mL of solution.

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Lattice Energy Application concept. If you need more Lattice Energy Application practice, you can also practice Lattice Energy Application practice problems.