Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- abbreviation chemistry The negative of the base 10
logarithm of the concentration ofhydroxide ions, measured inmoles per liter.
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
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Examples
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What is the pOH of a solution of 0.125 M sodium hydroxide?
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Slide 9: Examples Find [H+], [OH -], and pOH if pH = 8.32
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Slide 8: Examples Find [H+], pH, and pOH if [OH -] = 3.4 x 10-6 M
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Slide 7: Derivations of pH Also, [H+] [OH -] = 1 x 10-14 This is called the dissociation of water constant or the ion-product constant of water (Kw) and relates the concentration of H+ and OH - for any solution Given these derivations, we can calculate the pH, pOH, [H+], and [OH -] for any solution given one of the above!
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Determine the pH and the pOH when 25. 0ml of 0.12 M HCl titrates 30.0 ml of 0.12 M NaOH?
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.000101/50ml = .000101/.05L =. 00202M pOH = - log [OH -] = - log [.00202]
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pH + pOH = 14 (this holds true for any solution)
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[OH -] Therefore, [H+] = 1 x 10-7 = [OH -] We can define pOH as a measure of the basicity of a solution pOH = - log [OH -] and [OH -] = 10-OH For pure water, since [H+] = [OH -] = 1x 10-7,
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pOH = - log [OH -] = 1,004 pH+pOH = 14 pH = 14-pOH = 12,996
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