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A 280.0 mL buffer solution is 0.270 M in acetic acid and 0.270 M in sodium...

A 280.0 mL buffer solution is 0.270 M in acetic acid and 0.270 M in sodium acetate.

What is the initial pH of this solution? Express your answer using two decimal places.

What is the pH after addition of 0.0150 mol of HCl? Express your answer using two decimal places.

What is the pH after addition of 0.0150 mol of NaOH?Express your answer using two decimal places.

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