L2: Preparation of Buffer Solutions
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11 Terms
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Buffer Solution
a solution that resists changes in pH
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What is buffer solution made of?
* weak acid & its salt
* weak base & its salt
* weak base & its salt
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Buffer examples
* mix acetate acid & sodium acetate
* mix ammonia & ammonium chloride
* mix ammonia & ammonium chloride
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Acid/Base to salt ratio
1:1
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Buffering capacity works best when
the pH is near the pKa of the acid component
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Ka
ionization constant for weak acid
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Kb
ionization constant for a weak base
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Formula for pKa
pKa = -log Ka
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Formula for pKb
pKb = -log Kb
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Formula for pH of Buffer Solution
Henderson - Hasselbach Eq.
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Formula for pOH of Buffer Solution
Henderson - Hasselbach Eq.
Flashcards (48)