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Overview:
Previously, we showed how different compounds absorb light. The chemical structure of a molecule determines exactly how much light it absorbs, as well as which wavelengths are absorbed. It stands to reason then, that by removing an atom from a molecule, we can change the way it absorbs light. In this experiment, we will relate these two concepts by measuring the absorbance of a molecule under acidic and basic conditions. The changing pH will allow us to find how strongly a specific hydrogen is attached to our molecule, and we will observe how the changing chemical structure affects the observed absorbance. Afterwards, using mathematical analysis, we can experimentally determine the pKa, or affinity of our hydrogen to our parent molecule.
Level:
College / Upper Division, Graduate / Professional
Material Type:
Activity/Lab, Student Guide
Author:
Date Added:
12/04/2023
License:
Creative Commons Attribution Non-Commercial Share Alike Creative Commons Attribution Non-Commercial Share Alike
Language:
English
Media Format:
Graphics/Photos, Text/HTML

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