For the reaction o-toluidine hydrochloride salt + 10M NaOH -- o-toluidine + NaCl + H2O, how do you calculate the pH value required to obtain 99% amine form? I believe the questions refers to the o-toluidine form (-NH2), as I am supposed to do this calculation to find the pH required to recover 99% of o-toluidine when adding NaOH to o-toluidine hydrochloride. Formula I will use is pH = pKa + [A-/HA]. Would like to verify the value of 6.44 I am getting. Should it not be higher? update: thanks for the comments so far, looks I need to get more info on my end to clarify the question.

Question

For the reaction o-toluidine hydrochloride salt + 10M NaOH --> o-toluidine + NaCl + H2O, how do you calculate the pH value required to obtain 99% amine form? I believe the questions refers to the o-toluidine form (-NH2), as I am supposed to do this calculation to find the pH required to recover 99% of o-toluidine when adding NaOH to o-toluidine hydrochloride. Formula I will use is pH = pKa + [A-/HA]. Would like to verify the value of 6.44 I am getting. Should it not be higher? update: thanks for the comments so far, looks I need to get more info on my end to clarify the question.

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