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A 20.0-mL sample of 0.150 M KOH is titrated with 0.125 M HClO4 solution. Calculate the pH after the following volumes of acid have been added: (a) 20.0 mL, (b) 23.0 mL, (c) 24.0 mL, (d) 25.0 mL, (e) 30.0 mL.
A 25.0 mL sample of a 0.110 M solution of acetic acid is titrated with a 0.138 M solution of NaOH. Calculate the pH of the titration mixture after 10.0, 20.0, and 30.0 mL of base have been added. The Ka for acetic acid is 1.76x10^-5.
A 25.0 mL sample of a 0.080 M solution of aqueous trimethlyamine is titrated with a 0.10 M solution of HCl. Calculate the pH of the solution after 30.0 mL of acid have been added; pKa of (CH3)3N = 4.19 at 25°C.