The acid HX has a pKa of 5.00.  If 25.00 mL of a 0.106 M solution of HX are titrated with 0.100 M NaOH solution, what's the pH after 11.28 mL ofbase solution is added?

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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.