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An analytical chemist is titrating 60.3 mL of a 0.5500 M solution of nitrous acid (HNO2)...

An analytical chemist is titrating 60.3 mL of a 0.5500 M solution of nitrous acid (HNO2) with a 0.6400 M solution of KOH. The pKa of nitrous acid is 3.35. Calculate the pH of the acid solution after the chemist has added 22.2 mL of the KOH solution to it. Please round your answer to 2 decimal places

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