maximum buffering capacity: pH = pKa
buffering range: pH = pKa ± 1
a)
= 3.00
buffering range: 2.oo to 4.00
b)
= 6.00
buffering range: 5.00 to 7.00
c)
= 4.87
buffering range: 3.87 to 5.87
Which weak acid would be best to use when preparing a buffer solution with a pH of 8.20?
a) An acid with Ka = 1.0 x10-3 M
b) An acid with Ka = 1.0x1O-6 M
c) An acid with Ka = 1.3x10-5 M
d) An acid with Ka = 6.6 x10-9 M
e) An acid with Ka = 4.0 X 10-10 M
f) An acid with Ka = 7.9 X 10-5 M
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