QUESTION 2 Which of the following is the best buffer at neutral pH (pH 7.0)? Water, pKa = 14 %3D O Phosphoric acid, pKa1 = 2.15; pKa2 = 7.2; pKa3 = 12.35 %3D %3D Carbonic acid, pKa1 = 3.6; pKa2 = 10.3 %3D O Acetic acid, pKa = 4.76

Chemistry
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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O left; decrease
QUESTION 2
Which of the following is the best buffer at neutral pH (pH 7.0)?
O Water, pKa = 14
O Phosphoric acid, pKa1 = 2.15; pKa2 = 7.2; pKa3 = 12.35
%3D
%3D
%3D
%3D
Carbonic acid, pKa1 = 3.6; pKa2 = 10.3
%3D
O Acetic acid, pKa = 4.76
%3D
QUESTION 3
The pH of black tea is 5.5, while the pH of Coke is 2.5. Which of the following correctly
relative H* concentrations in coffee and Coke?
The HT concentration of tea is 1000x that of Coke.
Transcribed Image Text:O left; decrease QUESTION 2 Which of the following is the best buffer at neutral pH (pH 7.0)? O Water, pKa = 14 O Phosphoric acid, pKa1 = 2.15; pKa2 = 7.2; pKa3 = 12.35 %3D %3D %3D %3D Carbonic acid, pKa1 = 3.6; pKa2 = 10.3 %3D O Acetic acid, pKa = 4.76 %3D QUESTION 3 The pH of black tea is 5.5, while the pH of Coke is 2.5. Which of the following correctly relative H* concentrations in coffee and Coke? The HT concentration of tea is 1000x that of Coke.
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