Recall that a buffer can be composed of the following:
• weak base and its conjugate acid
• weak acid and its conjugate base
• weak acid and a strong base
▪ concentration of weak acid > concentration of strong base
• weak base and a strong acid
▪ concentration of weak base > concentration of strong acid
Select the statements that correctly describe buffers.
a) The pH of a buffer solution does not change significantly when any amount of a strong acid is added.
b) An acid added to the buffer solution reacts with the weak base of the buffer.
c) The pH of a buffer solution is determined by the ratio of the concentration of conjugate base to the concentration of strong acid.
d) A buffer is generally made up of a weak acid and its conjugate base.
e) The Ka of a buffer does not change when any amount of an acid is added to the buffer solution.
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