Question

1. A buffer solution contains 0.256 M hydrofluoric acid and 0.308 M potassium fluoride.

If 0.0414 moles of hydrochloric acid are added to 225 mL of this buffer, what is the pH of the resulting solution ?
(Assume that the volume does not change upon adding hydrochloric acid)

pH =

2. A buffer solution contains 0.328 M ammonium chloride and 0.331 M ammonia.

If 0.0396 moles of sodium hydroxide are added to 225 mL of this buffer, what is the pH of the resulting solution ?
(Assume that the volume does not change upon adding sodium hydroxide)

pH =

Answer 1

0.05 6 males 0419 - o 099 molus 2.2S 23 O0 Ho

Lo 44 3-0 32

Answer 2