Multiple Choice
Citric acid is a triprotic acid with three carboxylic acid groups having pKa values of 3.1, 4.8, and 6.4. If a solution of citric acid has a pH of 5.5, what can be said about the predominant protonation state of the citric acid?
A) 1 carboxylic acid group is deprotonated, 2 are protonated
B) 2 carboxylic acid groups are deprotonated, 1 is protonated
C) all 3 carboxylic acid groups are deprotonated
D) all 3 carboxylic acid groups are protonated
E) the protonation state cannot be determined
Correct Answer:
Verified
Correct Answer:
Verified
Q9: If a buffer is made with the
Q10: Which of the following atoms could interact
Q11: If gastric juice has a pH of
Q12: Lysine contains two amine groups (pK<sub>a</sub> values
Q13: Lactic acid is a common product of
Q15: Since pK<sub>a</sub> = -log K<sub>a</sub>, which of
Q16: Which of the following best explains the
Q17: Imidazole is a commonly used buffer in
Q18: Which of the following would likely form
Q19: Formic acid is the active agent in