Which of the following is TRUE? a. An effective buffer has a [base]/[acid] ratio

Question

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. None of the above are true 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. None of the above are 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. None of the above are true

Explanation / Answer

a. An effective buffer has a [base]/[acid] ratio in the range of 10-100; FALSE; must be near 1

b. A buffer is most resistant to pH change when [acid] = [conjugate base] TRUE, since ratio = 1

c. An effective buffer has very small absolute concentrations of acid and conjugate base. FALSE

d. None of the above are true; FALSE since b is true

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