Which of the following aqueous solutions are good buffer systems? . 0.17 M aceti

ID: 994940 • Letter: W

Question

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

0.17 M acetic acid + 0.10 M sodium acetate

0.11 M sodium hydroxide + 0.26 M sodiumbromide

0.34 M ammonia + 0.39 M barium hydroxide

0.23 M hydrobromic acid + 0.20 M potassiumbromide

0.35 M sodium nitrate + 0.25 M calcium nitrate

0.28 M perchloric acid + 0.18 Mpotassium perchlorate.

0.34 M ammonia + 0.35 M ammonium nitrate.

0.11 M hypochlorous acid + 0.13 Mhydrobromic acid.

0.12 M calcium hydroxide + 0.27 Mcalcium bromide.

0.33 M sodium iodide + 0.22 M barium iodide

answers:

1) 0.17 M acetic acid + 0.10 M sodium acetate

2) 0.34 M ammonia + 0.35 M ammonium nitrate.

explanation :

buffer is the mixture of weak acid and its salt of strong base . and weak base and its salt of strong acid.

strong acid and strong base cannot form buffers with their salts .

the above two mentioned are buffers

1) 0.17 M acetic acid (WA) + 0.10 M sodium acetate (salt of strong base)

2) 0.34 M ammonia (WB)+ 0.35 M ammonium nitrate. (salt of strong acid)

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.