Calculate the pH for each of the cases in the titration of 25.0 mL of 1.25 M pyridine, C5H5N(aq) with 0.250 M HBr(aq) at 25°C. The Kb of pyridine is 1.7×10−9. Report all your answers to 2 decimal places. Before the addition of any HBr: After the addition of 10.0 mL of HBr: After the addition of 62.5 mL of HBr: After the addition of 125.0 mL of HBr: After the addition of 135.0 mL of HBr:

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.