CHEM B1110 Lecture Notes - Lecture 22: Spectroscopy, Chlorophyll, Oxidation State
Document Summary
Gain of oxygen (why its called oxidation) De(cid:272)rease i(cid:374) o(cid:454)idatio(cid:374) (cid:374)u(cid:373)(cid:271)er (agai(cid:374) wh(cid:455) it is called reduction) Loss of oxygen (why it is called reduction) Equal to the charge on a monoatomic ion. +1 for hydrogen (except in metal hydrides, e. g. nah then its -1) 2 for oxygen in everything except for peroxides. The sum of oxidation numbers equals the charge on an ion. Different molecules can absorb light of different colors (energies) A less concentrated red solution will still reflect red but it won"t be as strong and it will also reflect a very weak green light while it still absorbs the blue light. A leaf looks green because it absorbs blue and red wavelengths and reflects yellow and green. A spectrometer measures how much light is absorbed at each wavelength across the uv and visible range (about 200 - 800nm) Beer discovers that the amount of light transmitted through a red solution decreases for more concentrated solutions.