We’re being asked to determine which of the given is a buffer system.
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
Which of the following could be a buffer?
a. NaCl + HF
b. HF + H2O
c. NaF + H2O
d. HF + NaF
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