### Explain equation to calculate the ph after the addition

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1) Acetate / Acetic Acid Biffers.

A) Starting with a 1.00 L solution that contains 0.25 M Ascorbic Acid and 0.50 M Na Ascorbate. Use the Henderson Hasselbalch Equation to calculate the pH, assuming that the Asborbic Acid Dissociation Constant= 8.0 x 10^-5 ?

B) Use the Henderson Hasselbalch Equation to calculate the pH after the addition of 0.10 M NaOH to this solution, assuming no change in volume?

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