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8 Cards in this Set
- Front
- Back
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What does pK indicate about acid?
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If [base] = [acid] then pH=pK
As pK decreases, strength of acid increases If low pK then dissociate more completely then those with high pK |
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Key buffer system in the human body is?
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The acid-base pair consisting of carbonic acid and bicarbonate
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What is the chemical composition of a buffer?
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weak acid and its conjugate base or weak base and conjugate acid.
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Define acid
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Any substance that dissociates into water to increase the [H+] (and lower the pH, is an acid)
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Define base
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Substance that combines with H+ when dissolved in water, and thus lowers the [H+]
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What is the equation for the carbonic acid-bicarbonate buffer?
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H2O + CO2 < > H2CO3 < > HCO3 - + H+
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What is the Henderson-Hasselbach equation?
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pH = pK + Log( [Base]/[Acid] )
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What kind of scale is the pH scale?
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an inverse log scale. Thus as pH decreases the concentration of hydrogen ions, [H+] increases.
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