HL Chemistry - Option A : Modern Analytical Chemistry. Principles of Spectroscopy. Definition. Spectroscopy - The study of the interaction of electromagnetic radiation with matter. Introduction. Spectroscopy is an analytical technique which helps determine structure.
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Types of Scattering
The energy of an exciting photon must equal the energy difference between the ground state and one excited state for absorption to occur… “Quantum Leap”
Absorbance = ebC
“Readout for an inexpensive photometer.”
transmittance scale is linear……
absorbance scale is exponential……..
thus, one usually reads transmittance,
then calculates absorbance
Titration of Phenylephrine
Ai - A
pKa = pH + log
A - An