Which of the Following Is TRUE

question 168

Multiple Choice

Which of the following is TRUE?

• A) An effective buffer has a [base]/[acid] ratio in the range of 10-100.
• B) A buffer is most resistant to pH change when [acid] = [conjugate base].
• C) An effective buffer has very small absolute concentrations of acid and conjugate base.
• D) The capacity of a buffer cannot be exceeded by adding too much strong base. It can only be exceeded by adding too much strong acid.
• E) A buffer has the best resistance to pH change when the buffer's pH is significantly lower than the pK_a of the acid used to make the buffer solution.

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