Determine Pka Methyl Red

PROJECT FINAL REPORT COVER PAGE host human activity: W4 PROJEC TITLE: The Dependence of Methyl fierce Molar extinguishing Coefficient on the pH DATE SUBMITTED: 5/11/00 design ASSIGNMENTS ROLE GROUP MEMBER FACILITATOR..Eugenia Koo sentence & TASK KEEPERAlan Lee SCRIBE..Chris Paryse donor.John McMonagle compact OF PROJECT CONCLUSIONS 1) At pHs below the pKa value ( florid solutions), the maximal milling machinery extermination coefficient occurs at 525 nm. pH values higher up the pKa (yellow solutions) have a maximum molar extinguishing coefficient at 429 nm. 2) There exists a critical wavelength among 462 and 465 nm, at which molar extinction coefficient is no longer dependent upon pH. 3) The endpoint to a titration apply methyl group red as an indicator lies mingled with pHs 4.823 and 5.862+0.001, which are the last values at which one sees a red or yellow color, respectively.

OBJECTIVES The primary objective of our raise was to determine the relationship between the molar extinction coefficient of methyl red and pH for various wavelengths. Not only was this to be done qualitatively, but also quantitatively through the reference of appropriate trendlines. Another, less cr itical, objective concerned the maximum wave! length thoughtless for separately pH tested. Our goal was to determine at what wavelengths all(prenominal) pH absorbed best, and if these wavelengths stayed constant for the range of pHs below the pKa(red solution) and for range above the pKa(yellow solution). BACKGROUND INFORMATION As say in the objectives section, this study will attempt to lucid and pull back a relationship between the extinction coefficient of methyl red and the pH of the solution. The study will also...If you indigence to get a full essay, order it on our website: OrderCustomPaper.com

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