Which of the following aqueous solutions are good buffer systems?. 0.13 M potassium fluoride + 0.26 M hydrofluoric acid 0.16 M hydrocyanic acid + 0.15 M sodium cyanide 0.25 M hydrobromic acid + 0.20 M potassium bromide 0.30 M acetic acid + 0.22 M potassium acetate 0.28 M ammonium bromide + 0.38 M ammonia

Question

Junior Kemp

Chemistry

4 September, 05:35

Which of the following aqueous solutions are good buffer systems?. 0.13 M potassium fluoride + 0.26 M hydrofluoric acid 0.16 M hydrocyanic acid + 0.15 M sodium cyanide 0.25 M hydrobromic acid + 0.20 M potassium bromide 0.30 M acetic acid + 0.22 M potassium acetate 0.28 M ammonium bromide + 0.38 M ammonia

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Answers (1)

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Cristopher Mitchell · Answer 1

0.16 M hydrocyanic acid + 0.15 M sodium cyanide

Explanation:

For a buffer system to be regarded as good, it must contain conjugate acid base pair in the solution. A buffer can be made by mixing a weak acid with its conjugate base.

In a good buffer system, their must be a close concentration of the acid base conjugates so as to ensure that the buffering capacity has the same neutralization capacity for any strong acid base system.