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 boric acid is 6.4 × 10−10. Determine the pKa of it.


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lb equals 9.19 kg

    Answer: 9.19 is the pKa of boric acid.
    • The negative logarithm of Ka would give us the pKa value.
    • The Ka provided in the question is 6.4 × 10−10
    • Taking negative log of this number we get, —log( 6.4 × 10−10) or — (— 9.19) or 9.19
    • Hence, the pKa is 9.19