Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Acidity/basicity of amino acids

  1. Jun 16, 2007 #1
    How can you tell if a given amino acid is acidic or basic? I'm lost here. My first thought would be to look at the pKa values. There is virtually no difference in the pKa values for the carboxyl groups; all range from 1.82-2.38. The same goes for the pKa values of the amino groups; all range from 8.8-10.96. Is it the pKa of the R group that determines whether they are acidic or basic? I'm staring at this table, and it only has pKa values for the R groups of 7 of the amino acids.

    Thanks very much,
  2. jcsd
  3. Jun 18, 2007 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    What would happen if there were more acidic groups on an amino acid or more basic groups on an amino acid?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook