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Nicotinic acid (niacin) is a monoprotic acid with the formula HC6H4NO2. A solution that is 0.012M in nicotinic acid has a pH of 3.39 at 25*C. What is the acid-ionization constant, Ka and pKa for this acid at 25*C?

is the ionization equation:
HC6H4NO2+ H20(l) <>C6H4NO^-(aq) + OH^-(aq)

it doesn't seem right. is it with H3O+ instead?

  • CHEM HELP - ,

    That is not the ionization reaction.
    HC6H4NO2+ H20(l) <>C6H4NO^-(aq) + H3O^+(aq)

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