Which of the following aqueous mixtures would make a good buffer system?
a. 0.25 M HClO4 and 0.22 M NaClO4
b. 0.35 M NH4Br and 0.37 M NH3
c. 0.12 M HCN and 0.21 M HCl
d. 0.11 M KOH and 0.29 M KCl
e. 0.36 M HNO3 and 0.29 M KNO3
Answer: B
Chemistry
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