Problem: Consider the ionic compounds KF, NaCl, NaBr, and LiCl. Use ionic radii (from the figure below) to estimate the cation–anion distance for each compound. Based on your answers, arrange these four compounds in order of decreasing lattice energy.Check your predictions with the experimental values of lattice energy from the table. Are the predictions from ionic radii correct?

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Consider the ionic compounds KF, NaCl, NaBr, and LiCl. Use ionic radii (from the figure below) to estimate the cation–anion distance for each compound. Based on your answers, arrange these four compounds in order of decreasing lattice energy.

Check your predictions with the experimental values of lattice energy from the table. Are the predictions from ionic radii correct?
Table showing experimental values of lattice energy for select compounds.

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Our tutors have indicated that to solve this problem you will need to apply the Lattice Energy concept. You can view video lessons to learn Lattice Energy. Or if you need more Lattice Energy practice, you can also practice Lattice Energy practice problems.