- #1
cookie13
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Hi there
I was wondering if anyone could help me with this buffers question ...
For which of these liquids is the pH likely to change least if a splash of concentrated sulphuric acid is added? Justify your answer:
a) 0.1M hydrochloric acid solution
b) 0.08M ethanoic acid/0.02M potassium ethanoate mixture
c) 0.8M ammonia/0.2M potassium ethanoate mixture
d) pure water
a is a strong acid and therefore it will have no buffering capacity ... and pure water (d) has no buffering capacity either ... Which leaves b and c...
The answer is (c) but how do you come to this answer?
There's a similar question:
"Which of these liquids will have the least change in pH if a sodium hydroxide pellet were to drop into a container of the liquid? Justify your answer:
a) pure water
b) 0.01 M ammonium chloride/0.01M ammonia mixture
c) 0.05M ammonium chloride/0.05 M ammonia mixture
d) 0.01M ammonium chloride/0.1M ammonia mixture
(Correct answer is c)
Any help will be much appreciated :)
I was wondering if anyone could help me with this buffers question ...
For which of these liquids is the pH likely to change least if a splash of concentrated sulphuric acid is added? Justify your answer:
a) 0.1M hydrochloric acid solution
b) 0.08M ethanoic acid/0.02M potassium ethanoate mixture
c) 0.8M ammonia/0.2M potassium ethanoate mixture
d) pure water
a is a strong acid and therefore it will have no buffering capacity ... and pure water (d) has no buffering capacity either ... Which leaves b and c...
The answer is (c) but how do you come to this answer?
There's a similar question:
"Which of these liquids will have the least change in pH if a sodium hydroxide pellet were to drop into a container of the liquid? Justify your answer:
a) pure water
b) 0.01 M ammonium chloride/0.01M ammonia mixture
c) 0.05M ammonium chloride/0.05 M ammonia mixture
d) 0.01M ammonium chloride/0.1M ammonia mixture
(Correct answer is c)
Any help will be much appreciated :)