Lecture 3 Notes_CHEM 107 - Lecture 3 Notes Any compound...

This preview shows page 1 - 2 out of 2 pages.

Lecture 3 Notes Any compound with protons can, theoretically, serve as a Bronsted acid. Clearly, some are stronger acids than others. Remember that the pKa values shown in the table on the preceeding page are in logarithmic units (the definition of "p"). Hence, sulfuric acid is, approximately, 60 orders of magnitude (10 60 ) stronger a Bronsted acid than is methane. That is, simply put, a big difference. If you could get a mole of sulfuric acid together with a mole of CH 3 (methyl) anion, the reaction would spontaneously proceed until there was no more methyl anion (10 23 molecules, but favored 60 orders of magnitude – you'd need approximately all the atoms in the universe to be only sulfuric acid and methyl anion until you might have one methyl anion hanging about at equilibrium). You may not have any methyl anion left, but you would have a fire. I digress. Another thing to note is that seemingly small changes in molecular structure make fairly large changes in reactivity. This is, actually, the central theme of organic chemistry:

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture