Describe the preparation of a buffer at pH 9.00 using actual reagents.

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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TABLE 8.3 Some K, and pK, Values for Weak Acids, in Decreasing
Order of Strength
Name
Formula
Ka
pK.
Phosphoric acid
Hydrofluoric acid
Formic acid
7.5 x 10-3
3.5 x 10-4
1.8 x 10-4
1.4 x 10-4
1.8 × 10-5
4.3 × 10-7
H;PO,
HF
2.12
3.45
НСООН
3.75
CH;CH(OH)COOH
CH;COOH
H,CO,
H,PO,-
H,BO3
NH,+
C,H;OH
HCO,
HPO,2-
Lactic acid
Acetic acid
Carbonic acid
3.85
4.75
6.37
Dihydrogen phosphate ion
Boric acid
6.2 x 10-8
7.21
7.3 x 10-10
5.6 х 10-10
9.14
Ammonium ion
9.25
1.3 x 10-10
5.6 х 10-11
Phenol
9.89
Bicarbonate ion
10.25
Hydrogen phosphate ion
2.2 x 10-13
12.66
Describe the preparation of a buffer at pH 9.00 using actual
reagents.
Transcribed Image Text:TABLE 8.3 Some K, and pK, Values for Weak Acids, in Decreasing Order of Strength Name Formula Ka pK. Phosphoric acid Hydrofluoric acid Formic acid 7.5 x 10-3 3.5 x 10-4 1.8 x 10-4 1.4 x 10-4 1.8 × 10-5 4.3 × 10-7 H;PO, HF 2.12 3.45 НСООН 3.75 CH;CH(OH)COOH CH;COOH H,CO, H,PO,- H,BO3 NH,+ C,H;OH HCO, HPO,2- Lactic acid Acetic acid Carbonic acid 3.85 4.75 6.37 Dihydrogen phosphate ion Boric acid 6.2 x 10-8 7.21 7.3 x 10-10 5.6 х 10-10 9.14 Ammonium ion 9.25 1.3 x 10-10 5.6 х 10-11 Phenol 9.89 Bicarbonate ion 10.25 Hydrogen phosphate ion 2.2 x 10-13 12.66 Describe the preparation of a buffer at pH 9.00 using actual reagents.
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