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KI dissolves in water but ..

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    Why does KI dissolve in water but not in tetrachloromethane? [2 marks]

    my attempt: KI has a giant ionic structure, ionic interaction will be formed between K+ and delta - O
    and between I- and delta +ve H
    This is all true because water is a polar molecule

    tetrachloromethane is not polar so doesnt dissolve in water??


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    (Original post by arvin_infinity)
    Why does KI dissolve in water but not in tetrachloromethane? [2 marks]

    my attempt: KI has a giant ionic structure, ionic interaction will be formed between K+ and delta - O
    and between I- and delta +ve H
    This is all true because water is a polar molecule

    tetrachloromethane is not polar so doesnt dissolve in water??


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    Yup, mention that like dissolves in like as well (polar solutes dissolve in polar solvents and vice versa).
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    (Original post by thegodofgod)
    Yup, mention that like dissolves in like as well (polar solutes dissolve in polar solvents and vice versa).
    As in KI is polar and tetra.. is non-polar?
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    (Original post by arvin_infinity)
    As in KI is polar and tetra.. is non-polar?
    :yep:
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    (Original post by thegodofgod)
    :yep:
    Oh riight! so all ionic compounds are polar ?
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    (Original post by arvin_infinity)
    Oh riight! so all ionic compounds are polar ?
    The more polar a bond is, the more ionic it becomes.

    That's why you have compounds which are covalent, with ionic characteristics, e.g. AlCl3, which are very polar, and thus moving away from the covalent side of the spectrum to the ionic side of the spectrum.

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Updated: March 23, 2012
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