Phenol is a weak acid that can be titrated with strong base. When a 0.10 M solution of phenol is titrated with 0.10 M NaOH, the pH at the midpoint of the titration is 9.9, and the pH at the equivalence point is 11.3. What is the value of Ka for phenol

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.

level 4 to level 2 : ))