Calculate the pH at the points in the titration of 20.00 mL of 0.318 M NH3 (Kb for NH3 = 1.8x10-5) when a) 10.00 ml of 0.475 M HCl  b) 15.00 ml of 0.475 M HCl  c) 20.00 ml of 0.475 M HCl have been added.  NH3 + HCl → (NH4+) + (Cl- )

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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.