Class: BE210
Group: W4
Members: FACILITATOR Eugenia Koo, TIME & TASK KEEPER Alan Lee, SCRIBE Chris Paryse,  PRESENTER John McMonagle
Date: 5/11/00
Full Text

Abstract:

1) At pHs below the pKa value (red solutions), the maximum molar extinction coefficient occurs at 525 nm. pH values above the pKa (yellow solutions) have a maximum molar extinction coefficient at 429 nm.
2) There exists a critical wavelength between 462 and 465 nm, at which molar extinction coefficient is no longer dependent upon pH.
3) The endpoint to a titration using methyl red as an indicator lies between pHs 4.823 and 5.862+0.001, which are the last values at which one sees a red or yellow color, respectively.