Calculate the pH during the titration of 40.00 mL of 0.1000M propanoic acid (HPr; Ka=1.3x10-5) after adding 10.41 mL of 0.1000M NaOH.
** All volumes should have a minimum of 2 decimal places.
millimoles of propanoic acid = 40 x 0.1 = 4
millimoles of NaOH added = 10.41 x 0.1 = 1.041
HPr + NaOH -----------------> Pr- + H2O
4 1.041 0 0
2.959 0 1.041
pH = pKa + log [salt / acid]
= 4.89 + log [1.041 / 2.959]
= 4.44
pH = 4.44
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