We’re being asked to determine which of the given solutions is a good 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 aqueous solutions are good buffer systems? and Why?
A. 0.19 M potassium hydroxide + 0.27 M potassium bromide.
B. 0.28 M hydroiodic acid + 0.18 M sodium iodide.
C. 0.30 M ammonia + 0.37 M ammonium nitrate.
D. 0.17 M hypochlorous acid + 0.12 M hydrobromic acid.
E. 0.38 M calcium bromide + 0.30 M barium bromide.
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