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Unformatted text preview: 250g 0.01g x 1,000,000 = 40 III. pH, Exponents, and Logarithms A. pH pH is defined as the negative logarithm of the hydrogen ion activity (pH = -log a H ). For our purposes, the concentration of hydrogen ion approximates the activity (a H = [H + ]). In every liter of pure water, 1 x 10-7 moles of water are dissociated into 1 x 10-7 moles of H+ and 1 x 10-7 moles of OH-. H 2 O H + + OH-pH = -log 10-7 = 7 pOH = -log 10-7 = 7 Therefore pOH + pH = 14....
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This note was uploaded on 06/21/2011 for the course NRES 201 taught by Professor Olson,k during the Spring '08 term at University of Illinois, Urbana Champaign.
- Spring '08