An unknown compound, X, is thought to have a carboxyl group with a pKa of 2.5 and a second ionizable group with a pKa between 5.0 and 8.0. When 50.0 mL of 0.2 M NaOH is added to 75.0 mL of a 0.2 M solution of X at pH 2.5, the pH increases to 7.13. Calculate the pKa of the second ionizable group of X.?
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Asked by Tyhj on 26th January, 2024
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