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    Ionic substances and exothermic lattice

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    State which compound in each of the following pairs of ionic substances has the most exothermic lattice and why:

    NaCl, CaS

    Li2O, Na2O

    LiF, NaCl

    MgO, CaS

    Plus two requirements that should be satisfied for a molecule to be polar

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    Solution Preview

    NaCl, CaS
    NaCl has a more exothermic lattice because Na+ and Cl- ions are very strongly ionic and therefore, the lattice energy of NaCl is more than that of CaS

    Li2O, Na2O
    Li2O has a more exothermic lattice because Li+ ion has a smaller ionic radius when compared to Na+ ion, and therefore, the lattice energy of Li2O is more than that of Na2O.

    LiF, NaCl ...

    Solution Summary

    Solution explains which compound, in a multitude of pairs of ionic substances, has the most exothermic lattice.

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