Question

PART 1: A buffer solution contains 0.431 M KH₂PO₄ and 0.289M K₂HPO₄.

If 0.0304 moles of sodium hydroxide are added to 125mL of this buffer, what is the pH of the resulting solution ?
(Assume that the volume does not change upon adding sodium hydroxide)

pH =

PART 2:A buffer solution contains 0.431 M ammoniumbromide and 0.342 M ammonia.

If 0.0288 moles of potassium hydroxide are added to 125 mL of this buffer, what is the pH of the resulting solution ?
(Assume that the volume change does not change upon adding potassium hydroxide)

pH =