Question

Part II: lonic Bonds Earlier in the semester you used solubility rules to Now you can explore why NaOH is soluble and all Lattice Energy bility rules to decide it a substance would dissolve in solution soluble and Al(OH)) is insoluble. The key to this concept is parate a mole of a solid into its gaseous ions. lue of AH for the following reaction. e stability of the ionic solid. The higher the lattice Lattice Energy - the enthalpy required to separate a mole of a sol Or in terms of a chemical equation, it is the value of AH for the foll NaCl(s) + Na'() + Cl(s) The value of AHLattice tells us something about the stability of the ini energy, the more tightly the solid is held together. If the lattice energy is related to the energy of attraction of oppositely che predict how the following might influence the value of the lattice energy: o Magnitude of the charge of the ion nergy of attraction of oppositely charged particles, then o Distance between the ions in the solid 2. Based on your answers above, explain the data in this table: Compound Lattice Energy Solubility NaOH 900 kJ/mol 420 g/L Mg(OH)2 3006 kJ/mol 0.009 g/L Al(OH) 5627 kJ/mol - O g/L 3. Predict which compound would have the highest melting point. Explain. 4. Arrange the following compounds in order of decreasing lattice energy: mys, decreasing lattice energy: Mgs, NaCl, NaF, Mgo. Explain your reasoning.

Answer 1

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