CHM3120L

Introduction to Analytical Chemistry: Laboratory

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 Spectrophotometric Determination of pH : Report Template

• Print a graph showing the spectra of only the acid and base forms of bromocresol green. The graph should be of a reasonable size and appropriately labeled—see the example provided in the pre-lab problem.
• In tabular form show the wavelengths selected for measurements, the molar absorptivities of the acid and base forms of bromocresol green at these wavelengths, and the absorbances for the solution of unknown pH.
• Calculate and report the [In-]/[HIn] ratio and pH for your unknown solution.