Using the table given (picture attached) for Ka values, compare the pH of a HF buffer that contains 0.15 M HF and 0.070 M NaF with another HF buffer that contains 0.040 M HF and 0.160 M NaF. a.) What is the pH of a buffer solution containing 0.15 M HF and 0.070 M NaF? Express your answer using two decimal places. b.) What is the pH of a buffer solution containing 0.040 M HFand 0.160 M NaF? Express your answer using two decimal places.

Organic Chemistry
8th Edition
ISBN:9781305580350
Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Chapter23: Amines
Section: Chapter Questions
Problem 23.31P
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Using the table given (picture attached) for Ka values, compare the pH of a HF buffer that contains 0.15 M HF and 0.070 M NaF with another HF buffer that contains 0.040 M HF and 0.160 M NaF.

a.) What is the pH of a buffer solution containing 0.15 M HF and 0.070 M NaF? Express your answer using two decimal places.

b.) What is the pH of a buffer solution containing 0.040 M HFand 0.160 M NaF? Express your answer using two decimal places.

Acids
Phosphoric acid
Nitrous acid
Hydrofluoric acid
Formic acid
Acetic acid.
Carbonic acid
Hydrosulfuric acid
Dihydrogen phosphate
Hydrocyanic acid
Hydrogen carbonate
Hydrogen phosphate
Bases
Methylamine
Carbonate
Ammonia
H3PO4
HNO₂
HF
HCHO,
HC₂H30₂
H₂CO3
H₂S
H₂PO4
HCN
HCO3
HPO 2
CH,—NH,
CO3²-
NH3
K₂
7.5 × 10-3
4.5 x 10-4
3.5 x 10-4
1.8 X 10 4
1.8 × 10-5
4.3 x 10-7
9.1 × 10-8
6.2 x 10-8
4.9 × 10-10
5.6 × 10-11
2.2 × 10-13
Kb
4.4 x 10-4
2.2 x 10-4
1.8 × 10-5
Transcribed Image Text:Acids Phosphoric acid Nitrous acid Hydrofluoric acid Formic acid Acetic acid. Carbonic acid Hydrosulfuric acid Dihydrogen phosphate Hydrocyanic acid Hydrogen carbonate Hydrogen phosphate Bases Methylamine Carbonate Ammonia H3PO4 HNO₂ HF HCHO, HC₂H30₂ H₂CO3 H₂S H₂PO4 HCN HCO3 HPO 2 CH,—NH, CO3²- NH3 K₂ 7.5 × 10-3 4.5 x 10-4 3.5 x 10-4 1.8 X 10 4 1.8 × 10-5 4.3 x 10-7 9.1 × 10-8 6.2 x 10-8 4.9 × 10-10 5.6 × 10-11 2.2 × 10-13 Kb 4.4 x 10-4 2.2 x 10-4 1.8 × 10-5
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