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
Total tried: Correct: Wrong:
The dissociation constant (Ka value) of lactic acid is 1.38 × 10−4. Determine the pKa of it.
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lb equals 3.86 kg
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Answer: 3.86 is the pKa of lactic acid.
- The negative logarithm of Ka would give us the pKa value.
- The Ka provided in the question is 1.38 × 10−4
- Taking negative log of this number we get, —log( 1.38 × 10−4) or — (— 3.86) or 3.86
- Hence, the pKa is 3.86