Ionic EquilibriumHard
Question
A student was given 0.01 mole of a weak organic acid and told to determine the Ka of the acid. He prepared 100 ml of an aqueous solution containing the sample. The volume of 50 ml of this solution was then titrated with NaOH to the equivalence point. The titrated solution was then mixed with the other 50 ml of the solution and the pH was determined. A value of 4.80 was obtained for the mixed solution. What is the approximate value of pKa for the acid?
Options
A.5.10
B.4.50
C.4.80
D.4.20
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