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7. Using the values of Ka given below Acid Acetic Benzoic Carbonic H₂CO3 Chlorous Cyanic Formic Formula CH COOH C.HSCOOH Mix#1 Hydrocyanic HCN Hydrofluoric HF Mix #2 HCIO₂ Mix#1 HOCN b) pH = 1.20 Mix #2 HCOOH K₁ 1.8 x 10-5 6.5 × 10-5 Acid Kal = 4.3 x 10-7 1.1 x 10-2 Acid 2.0 × 10 1.8 x 104 4.9 × 10-10 3.5 x 104 pKa Acid Hypobromous HOBr Hypochlorous HOCI Hypoiodous HOI Oxalic Sulfurous Formula Base Base H₂C₂O4 6 HC₂04 H₂SO3 For each pH: - Pick the best two pairs of compounds that could be mixed to create a buffer of the desired pH HSO3 (Each mix must contain two complete neutral compounds, NOT JUST IONS!) State the base/acid ratio that would be needed. - For each pH, note the pair that would create the best buffer. a) pH = 3.50 K₁ 2.8 × 10⁹ 2.9 × 10-8 2.3 × 10-11 Kal = 5.9 × 10- 2 K₁2=6.4 x 10- 5 Kal = 1.7 x 10- 2 K₁2=6.4 x 10- 8 B/A Ratio B/A Ratio pKa Best? Best?

7. Using the values of Ka given below Acid Acetic Benzoic Carbonic H₂CO3 Chlorous Cyanic Formic Formula CH COOH C.HSCOOH Mix#1 Hydrocyanic HCN Hydrofluoric HF Mix #2 HCIO₂ Mix#1 HOCN b) pH = 1.20 Mix #2 HCOOH K₁ 1.8 x 10-5 6.5 × 10-5 Acid Kal = 4.3 x 10-7 1.1 x 10-2 Acid 2.0 × 10 1.8 x 104 4.9 × 10-10 3.5 x 104 pKa Acid Hypobromous HOBr Hypochlorous HOCI Hypoiodous HOI Oxalic Sulfurous Formula Base Base H₂C₂O4 6 HC₂04 H₂SO3 For each pH: - Pick the best two pairs of compounds that could be mixed to create a buffer of the desired pH HSO3 (Each mix must contain two complete neutral compounds, NOT JUST IONS!) State the base/acid ratio that would be needed. - For each pH, note the pair that would create the best buffer. a) pH = 3.50 K₁ 2.8 × 10⁹ 2.9 × 10-8 2.3 × 10-11 Kal = 5.9 × 10- 2 K₁2=6.4 x 10- 5 Kal = 1.7 x 10- 2 K₁2=6.4 x 10- 8 B/A Ratio B/A Ratio pKa Best? Best?

Chemistry
Chemistry
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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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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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c) pH = 9.00 Mix#1 Mix #2 Acid Base B/A Ratio Best? 8. What mass of sodium benzoate should you add to 150.0mL of a 0.15M benzoic acid solution to obtain a buffer with a pH of 4.25?
Transcribed Image Text:c) pH = 9.00 Mix#1 Mix #2 Acid Base B/A Ratio Best? 8. What mass of sodium benzoate should you add to 150.0mL of a 0.15M benzoic acid solution to obtain a buffer with a pH of 4.25?
7. Using the values of Ka given below Acid K₁ Acetic 1.8 x 10-5 Benzoic Carbonic Chlorous Cyanic Formic Hydrocyanic HCN Hydrofluoric HF Mix#1 Formula CH₂COOH C6H5COOH H₂CO3 HCIO₂ Mix #2 HOCN Mix#1 HCOOH b) pH = 1.20 Mix #2 6.5 × 10-5 Kal = 4.3 x 10-7 1.1 x 10-2 Acid 2.0 × 10-4 Acid 1.8 x 104 4.9 × 10-10 3.5 x 104 pKa Acid Hypobromous HOBr Hypochlorous HOCI Hypoiodous HOI Oxalic Sulfurous Formula Base H₂C₂O4 Base HC₂04 H₂SO3 HSO3 For each pH: - Pick the best two pairs of compounds that could be mixed to create a buffer of the desired pH K₂ 2.8 × 10⁹ (Each mix must contain two complete neutral compounds, NOT JUST IONS!) State the base/acid ratio that would be needed. - For each pH, note the pair that would create the best buffer. a) pH = 3.50 2.9 × 10-8 2.3 × 10-11 Kal = 5.9 × 10- 2 K₁2= 6.4 x 10- 5 Kal = 1.7 x 10 2 K2=6.4 x 10- 8 B/A Ratio B/A Ratio pKa Best? Best?
Transcribed Image Text:7. Using the values of Ka given below Acid K₁ Acetic 1.8 x 10-5 Benzoic Carbonic Chlorous Cyanic Formic Hydrocyanic HCN Hydrofluoric HF Mix#1 Formula CH₂COOH C6H5COOH H₂CO3 HCIO₂ Mix #2 HOCN Mix#1 HCOOH b) pH = 1.20 Mix #2 6.5 × 10-5 Kal = 4.3 x 10-7 1.1 x 10-2 Acid 2.0 × 10-4 Acid 1.8 x 104 4.9 × 10-10 3.5 x 104 pKa Acid Hypobromous HOBr Hypochlorous HOCI Hypoiodous HOI Oxalic Sulfurous Formula Base H₂C₂O4 Base HC₂04 H₂SO3 HSO3 For each pH: - Pick the best two pairs of compounds that could be mixed to create a buffer of the desired pH K₂ 2.8 × 10⁹ (Each mix must contain two complete neutral compounds, NOT JUST IONS!) State the base/acid ratio that would be needed. - For each pH, note the pair that would create the best buffer. a) pH = 3.50 2.9 × 10-8 2.3 × 10-11 Kal = 5.9 × 10- 2 K₁2= 6.4 x 10- 5 Kal = 1.7 x 10 2 K2=6.4 x 10- 8 B/A Ratio B/A Ratio pKa Best? Best?
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