Determine Pka Methyl Red

PROJECT FINAL REPORT COVER PAGE radical human activity: W4 PROJEC TITLE: The Dependence of Methyl cerise 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 heavyset OF PROJECT CONCLUSIONS 1) At pHs below the pKa value ( florid solutions), the supreme milling machinery extermination coefficient occurs at 525 nm. pH values in a higher place the pKa (yellow solutions) have a maximum molar liquidation coefficient at 429 nm. 2) There exists a critical wavelength among 462 and 465 nm, at wh ich molar extinction coefficient is no longer dependent upon pH. 3) The endpoint to a titration employ methyl group red as an indicator lies amid 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 guess 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 typeface of appropriate trendlines. Another, less critical, objective concerned the maximum wavelength preoccupied for separately pH tested. Our goal was to determine at what wavelengths each(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 objecti ves section, this study will attempt to dis! tinct and pull back a relationship between the extinction coefficient of methyl red and the pH of the solution. The study will also...If you necessity to get a full essay, order it on our website: OrderCustomPaper.com

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