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1. Calculate the pH of the following solutions:

Buffer 1: 25.0 mL of 0.20 M acetic acid with 35.0 mL of 0.10 M NaOH.

Buffer 2: 50.0 mL of 0.18 M NH3 with 5.0 mL of 0.36 M HBr.

2. To make a buffer with a pH of 5.00, how much sodium acetate would you have to add to a solution that contains 10.0 mmol of acetic acid?

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