1. Which of the following aqueous solutions are good buffer systems? .21 M hydro

ID: 1030683 • Letter: 1

Question

1. Which of the following aqueous solutions are good buffer systems?

.21 M hydrochloric acid + .18 M sodium chloride

.32 M hypochlorous acid + .22 M potassium hypochlorite

.26 M ammonium bromide + .32 M ammonia

.14 M potassium acetate + .25 M acetic acid

.21 M hydrofluoric acid + .13 M potassium fluoride

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2. Which of the following aqueous solutions are good buffer systems?

.26 M hydrochloric acid + .18 M potassium chloride

.27 M ammonia + .39 M ammonium bromide

.15 M sodium hydroxide + .29 M sodium chloride

.17 M hydrofluoric acid + .16 M hydroiodic acid

.34 M potassium chloride + .23 M calcium chloride

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3. Which of the following aqueous solutions are good buffer systems?

.31 M sodium bromide + .24 sodium iodide

.32 M ammonia + .38 M ammonium bromide

.29 M hydroiodic acid + .18 M potassium iodide

.17 M potassium hydroxide + .29 M potassium bromide

.12 M hydrocyanic acid + .17 potassium cyanide

.32 M hypochlorous acid + .22 M potassium hypochlorite

.26 M ammonium bromide + .32 M ammonia

.14 M potassium acetate + .25 M acetic acid

.21 M hydrofluoric acid + .13 M potassium fluoride

2.)

.27 M ammonia + .39 M ammonium bromide

3.)

.32 M ammonia + .38 M ammonium bromide

.12 M hydrocyanic acid + .17 potassium cyanide

Explanation :

buffer forms from the mixing of weak acid and its conjugate base (or) weak base and its conjugate acid.

HCl + NaCl , KOH + KCl , NaOH + NaCl , .etc are not forming buffers.

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