Determine pKa from Ka
8. Buffer and Isotonic Solution 8.1) Buffer 8.1.1) Determine pKa from Ka
8.1.1.1) Determine pKa from Ka Easy 1
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The dissociation constant (Ka value) of acetic acid is 1.75 × 10−5. Determine the pKa of it.
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lb equals 4.76 kg
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Answer: 4.76 is the pKa of acetic acid.
- The negative logarithm of Ka would give us the pKa value.
- The Ka provided in the question is 1.75 × 10−5
- Taking negative log of this number we get, —log( 1.75 × 10−5) or — (— 4.76) or 4.76
- Hence, the pKa is 4.76