Answer to Question #170793 in General Chemistry for Claire

Question

Below is the pH curve of a weak acid (HA) titrated with a strong base. Answer the following question based on the interpretation of this pH curve. Be as accurate as possible.

(image) https://gyazo.com/ee5770d59aece797549a570114d6e0a3

What is the pH at the equivalence point of this titration? Answer in units of pH.

How much base much be added to make the solution equalized? Answer in units of mL.

What is the pKa for this acid?

Answer 1

The pH at the equivalence point corresponds to half of the jump. Moreover, on average, it is equal to the pK of a weak electrolyte, which is titrated