1. Which of the following aqueous solutions are good buffer systems? . 0.36 M po
ID: 1045885 • Letter: 1
Question
1.
Which of the following aqueous solutions are good buffer systems?
.
0.36 M potassium iodide + 0.23 M potassium bromide
0.29 M ammonia + 0.35 M ammonium bromide
0.15 M acetic acid + 0.11 M sodium acetate
0.18 M sodium hydroxide + 0.25 M sodium chloride
0.28 M hydroiodic acid + 0.22 M potassium iodide
2.
Which of the following aqueous solutions are good buffer systems?
.
0.14 M acetic acid + 0.15 M sodium acetate
0.28 M ammonia + 0.30 M calcium hydroxide
0.18 M barium hydroxide + 0.29 M barium chloride
0.30 M calcium bromide + 0.28 M potassium bromide
0.24 M nitric acid + 0.21 M potassium nitrate
Explanation / Answer
mixture of
i) weak acid + salt of its conjugate base
ii) weak base + salt of conjugate acid
are acting as good buffer systems
1.
in the given combinations,
0.29 M ammonia + 0.35 M ammonium bromide
0.15 M acetic acid + 0.11 M sodium acetate can act as good buffer system.
2.
in the given combination,
0.14 M acetic acid + 0.15 M sodium acetate can act as good buffer system
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