Chemistry 3) How many grams of solid potassium fluoride should be added to 1.50 L of a 8.35x10-2 M hydrofluoric acid solution to prepare a buffer with a pH of 2.473 ? grams potassium fluoride =

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Chemistry
3) How many grams of solid potassium
fluoride should be added to 1.50 L of a
8.35x10-2 M hydrofluoric acid solution to
prepare a buffer with a pH of 2.473 ?
grams potassium fluoride =
4) a) Design a buffer that has a pH of 9.77
using one of the weak acid/conjugate base
systems shown below.
Weak Acid Conjugate
Base
pka
Ка
HC204 C2042-
6.4 x 10 4.19
5
H2PO4 HPO42-
6.2 x 10 7.21
8
Co32-
4.8 x 10 10.32
11
HCO3
How many grams of the sodium salt of the
Transcribed Image Text:Chemistry 3) How many grams of solid potassium fluoride should be added to 1.50 L of a 8.35x10-2 M hydrofluoric acid solution to prepare a buffer with a pH of 2.473 ? grams potassium fluoride = 4) a) Design a buffer that has a pH of 9.77 using one of the weak acid/conjugate base systems shown below. Weak Acid Conjugate Base pka Ка HC204 C2042- 6.4 x 10 4.19 5 H2PO4 HPO42- 6.2 x 10 7.21 8 Co32- 4.8 x 10 10.32 11 HCO3 How many grams of the sodium salt of the
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