Chem 287_Chapter 18

Chem 287_Chapter 18 - Lectures: Classical Methods of...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Lectures: Classical Methods of Chemical Analysis 1 Let There Be Light Chapter 18 To be covered: Problems: 3,5,14,18 1) Nature of Light 2) Color and energy transitions 3) Absorption 4) Quantification and errors Spectrophotometry Spectrophotometry is the study of energy transitions. C C A L where E j E i where: C = Collisions A = Absorption L = Luminescence or emission Absorbance and Emission of EM radiation are quantitative.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Lectures: Classical Methods of Chemical Analysis 2 Electromagnetic radiation E A Velocity = c H Wavelength ( ) Wavelength, Frequency, and Energy hc h E E = energy h = Plank’s constant 6.62 x 10 -34 J-s = frequency c = speed of light 3 x 10 10 cm / s = wavelength v = 1/   wavenumbers, cm -1 ) ~
Background image of page 2
Lectures: Classical Methods of Chemical Analysis 3 The Electromagnetic Spectrum Wavelength cm x-ray UV visible IR Rf 10 -11 10 -9 10 -6 10 -5 10 -4 10 -2 10 2 Wavelength ( , cm) 10 8 10 12 10 14 1 15 1 16 1 19 1 21 Frequency ( , Hz) 10 10 10 10 Nuclear Inner shell electrons Outer shell electrons Molecular vibrations Molecular rotation Nuclear Spin Visible Spectrum 390 780 450 520 590 620
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 9

Chem 287_Chapter 18 - Lectures: Classical Methods of...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online