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 salicylic acid is 1.06 × 10−3. Determine the pKa of it.


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lb equals 2.94 kg

    Answer: 2.94 is the pKa of salicylic acid.
    • The negative logarithm of Ka would give us the pKa value.
    • The Ka provided in the question is 1.06 × 10−3
    • Taking negative log of this number we get, —log( 1.06 × 10−3) or — (— 2.94) or 2.94
    • Hence, the pKa is 2.94


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