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Which of the following aqueous solutions are good buffer systems ?

. 0.26 M hydrochloric acid + 0.24 M potassium chloride
.
0.14 M acetic acid + 0.20 M potassium acetate
.
0.16 M potassium hypochlorite + 0.23 M hypochlorous acid
.
0.31 M hydrocyanic acid + 0.28 M potassium cyanide
.
0.26 M ammonium nitrate + 0.32 M ammonia
.

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  1. A good buffer consists of a weak acid and its salt OR a weak base and its salt. For example, a is not a good buffer while b is. There are others in your list that are good buffers.

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