問題詳情
II. Choose one correct answer for the following questions
61. Which one is CORRECT for buffer capacity of a solution?
(A) It is defined as the number of moles of a strong acid or a strong base that cause 1 mL of the buffer to undergo a1.00-unit change in pH.
(B) It depends only on the total concentration of buffers, not on their concentration ratio.
(C) The pKa of the acid chosen for a given application should lie within ± 1 unit of the desired pH for the buffer.
(D) A buffer solution of any desired pH can be prepared by combining calculated quantities of buffer pair, no need anyadjustment.
(E) Dissociation constants would not interfere with the predicted pH values.
61. Which one is CORRECT for buffer capacity of a solution?
(A) It is defined as the number of moles of a strong acid or a strong base that cause 1 mL of the buffer to undergo a1.00-unit change in pH.
(B) It depends only on the total concentration of buffers, not on their concentration ratio.
(C) The pKa of the acid chosen for a given application should lie within ± 1 unit of the desired pH for the buffer.
(D) A buffer solution of any desired pH can be prepared by combining calculated quantities of buffer pair, no need anyadjustment.
(E) Dissociation constants would not interfere with the predicted pH values.
參考答案
無參考答案
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