The equivalence point in the titration of this weak acid is 50.80 mL. At 25.40 mL, the pH was measured to be 3.86. What is the pKa of the unknown acid? (The Ka is 1.38E-4)
Added by Lisa W.
Step 1
At the half-equivalence point, the concentration of the weak acid equals the concentration of its conjugate base. This is because half of the weak acid has been titrated, meaning it has reacted with the base and turned into its conjugate base. Show more…
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