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    Monkey Stew's Avatar
    Monkey Stew Posts: 3, Reputation: 1
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    #1

    Mar 18, 2009, 08:25 PM
    Identify Lewis acid and base
    Identify the Lewis acid and the Lewis base in each of the following reactions:
    a. AlCl3 + Cl- -> AlCl4-
    b. BF3 + C5H5N -> C5H5N -> BF3
    c. Co3+ + 6 NH3 -> [Co(NH3)6]3+
    d. SO2 + HO- -> HSO3-
    Perito's Avatar
    Perito Posts: 3,139, Reputation: 150
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    #2

    Mar 19, 2009, 04:40 AM

    Lewis Acids are electron acceptors. Lewis bases are electron donors. The negatively charged species are the electron donors. Why? Which are the acceptors?
    MathWhiz's Avatar
    MathWhiz Posts: 1, Reputation: 1
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    #3

    Aug 31, 2010, 10:45 PM
    Lewis acid are electron acceptors. Lewis bases are electron donors. Lewis Bases will have a lone pair of electrons in their valence shell. This is big hint. Also, period 3 and up are able to expand their octet allowing them to accept more electrons, because they a empty d orbital. One last thing. Bf3 is a lewis acid because even though all of its electrons are paired, its valence shell isn't filled completely. Therefore, it is able to accept more electrons. Also it does not have a lone pair so it can't be a lewis base.

    Lewis Bases: Cl-, C5H5N, NH3, HO-

    Lewis acid AlCl3, BF3, Co3, SO2
    DrBob1's Avatar
    DrBob1 Posts: 425, Reputation: 86
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    #4

    Sep 1, 2010, 08:09 AM

    We should point out that Lewis acids and bases are electron PAIR acceptors and donors, respectively.
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