Calculate the ph of the buffer after 2 ml of naoh

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Question- A solution 25.0 mL NaCH3COO and 10.0 mL 1.0 M CH3COOH has a pH of 5.18. Find the Ka of acetic acid and calculate the pH of the buffer after 2 mL of 1.0 M NaOH are added to the solution.

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