The pK of acetic acid is 4.76. What is the effective buffering range? O pH = 4.76 O pH = 1-7 O pH = 3.76-5.76 O pH = 4.66-4.86
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Step 1: The effective buffering range of a weak acid is generally considered to be within one pH unit of its pKa. Show more…
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1) What is the pKa of acetic acid? Over what range of pH values would an acetic acid/acetate buffer be effective? 2) What is the pKa of H2PO4-? Over what range of pH values would a dihydrogen phosphate/hydrogen phosphate buffer be effective?
Sri K.
For a weak acid with a pKa = 6.5, the effective buffering range is usually considered to be pH 5.5 to pH 7.5. pH 6 to pH 7. Dependent on the molarity of the acid. pH 6.4 to pH 6.6.
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What is the effective pH range of a buffer (relative to the pK $_{\mathrm{a}}$ of the weak acid component)?
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