Given the following table of information, determine the pKa or pKb

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Practice Problems

Question 11: Determining Values for Ka and Kb

Given the following table of information, determine the pKa or pKb for the following reactions.

a.) What is the pKa of lactic acid?

b.) What is the pKa of boric acid?

c.) What is the pKb of Formate ion?

d.) What is the pKb of Benzoate ion?

Hint

Sciencea)HC3H5O3 + H2O ⇌ C3 H5 O3 (-) + H3O (+)Ka = [C3 H5 O3(-)][H3O (+)]/HC3H5O3 = 0.00182*0.00182/0.025 = 1.32*10-4pKa = -log(Ka) = log(1.32*10-4) = 3.58...

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