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Homework Help: Why is this so?

  1. Oct 16, 2006 #1
    Why is NH2- a stronger base than H-. I would think that due to N's greater electronegatavity, it would want to hold on to its electrons more, making it less basic.
     
  2. jcsd
  3. Oct 16, 2006 #2
    NH2- + H+ --> NH3; (delta)G reaction = -1657 Kj/mol
    H- + H+ --> H2; (delta)G reaction = -1649 Kj/mol

    So, the reaction NH2- + H2O --><-- NH3 + OH- has a lesser (delta)G than the reaction H- + H2O --><-- H2 + OH-; that is, the first one has a greater equilibrium constant than the second.

    with --><-- I mean equilibrium reaction.
     
  4. Oct 16, 2006 #3
    Thanks for the answer, but speaking strictly based on structure, how would we determine this?
     
  5. Oct 19, 2006 #4
    I don't think it's possible, at least AFAIK.
     
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