Ka from pKa
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 pKa of lactic acid is 3.86. Determine the dissociation constant (Ka) of it.
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lb equals 1.38 × 10−4 kg
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Answer: 1.38 × 10−4 is the Ka of lactic acid.
- The antilog of the negative pKa would give us the Ka value.
- The pKa provided in the question is 3.86
- Taking negative antilog of the negative of this number we get, antilog(- 3.86) = 1.38 × 10−4
- Hence, the pKa is 3.86