The pKa of the weak acid HA is 4.49. If 0.17 mL of a 1.00 M solution of hydrochloric acid are added to a solution made by mixing 20.00 mL of 0.100 M HA and 10.00 mL of 0.100 M NaOH, what is the pH of the solution after the acid 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.