What does spectroscopy tell us?
1 Answer
It gives us information about the identity and structure of a substance, or the substances present in a mixture and (sometimes) their quantities.
Explanation:
You asked this question under the category of infrared spectroscopy. Infrared spectroscopy gives us information about the bonds present in a substance. Molecules absorb infrared energy at different frequencies, making the bonds in the molecule vibrate. Each frequency corresponds to a specific vibrational mode of the molecule, and is influenced by the strength of the bond and the masses of the bonded atoms or groups. As a result, certain functional groups produce peaks in the infrared spectrum at characteristic frequencies.
For example, the presence of a sharp peak between
The size of the absorptions is related to the amount of the substance present in the sample, so it is possible to make a calibration curve and use infrared spectroscopy to monitor the progress of a reaction, or for quality control.