Which of the Following Statements About Buffers Is True

question 11

Multiple Choice

Which of the following statements about buffers is true?

• A)A buffer composed of a weak acid of pK_a = 5 is stronger at pH 4 than at pH 6.
• B)At pH values lower than the pK_a,the salt concentration is higher than that of the acid.
• C)The pH of a buffered solution remains constant no matter how much acid or base is added to the solution.
• D)The strongest buffers are those composed of strong acids and strong bases.
• E)When pH = pK_a,the weak acid and salt concentrations in a buffer are equal.

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