1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Simple Algerbraic Manipulation is Confusing Me

  1. Feb 4, 2008 #1
    I'm working on a chemistry problem and I'm trying to follow the derivation for % ionization (of a weak acid or base) but I can't seem to understand how rearrangement of eq. 6 results in eq. 7.

    In more general terms, I started with the Hendreson Hasselbalch equation:

    pH = pka + log(A-/AH)

    What I want to find is, A-/(AH + A-)

    This is giving me a real headache, can anyone help?

    Attached Files:

  2. jcsd
  3. Feb 5, 2008 #2
    Bring the A- to the LHS of (6). Add 1 to both sides and convert the LHS to a single fraction. Invert the fractions and multiply by 100.
  4. Feb 5, 2008 #3
    Thanks, I've got it now.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook