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Stoichiometric ionization constants of phthalic acid have been determined in potassium chloride solutions at temperatures from 10 to 40 °C, with molalities up to 3 mol⋅kg−1, from potentiometric titrations of potassium hydrogen phthalate. The procedure described by Gans and O’Sulliven (Talanta 51:33–37, 2000) was followed to calibrate the electrochemical cell in terms of hydrogen ion concentration...
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