Recognizing the Acid-base Titration Endpoint

how do you recognize the endpoint in an acid-base titration
- Anonymous

If I remember my high school chemistry lab correctly, one uses a bit of special indicator mixed in with the solution.  Phenolphthalein was the one we used which changes color from red to colorless when the pH goes from acid to base (maybe it was colorless to red, I don't remember everything).   The web site has a raft of different indicators for different ranges of pH changes.

LeeH

(published on 03/29/2011)