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A 280.0 mL buffer solution is 0.260 M in acetic acid and 0.260 M in sodium...

A 280.0 mL buffer solution is 0.260 M in acetic acid and 0.260 M in sodium acetate.

Part A

What is the initial pH of this solution?

Part B

What is the pH after addition of 0.0100 mol of HCl?

Part C

What is the pH after addition of 0.0100 mol of NaOH?

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