A solution contains 2×10-3 mol/L of a weak acid (pK=3.5) and 2×10-3 mol/L of its conjugate base. Its pH is best approximated by which one of the following?
Correct Answer: 3.5
Description: Buffers consist of solutions of acid-base conjugate pairs, such as acetic acid and acetate.a. Near its pK, a buffer maintains the pH of a solution, resisting changes due to addition of acids or bases. For a weak acid, the pK is often designated as pKa .b. At the pKa , and are equal, and the buffer has its maximal capacity.The pH and pK are related as follows: pH=pK+log(/). Thus, when the concentrations of a weak acid and its conjugate base are equal, the pH equals the pK. The pK is defined as the pH at which =
Category:
Biochemistry
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now