Regarding the Chem paper...

Not sure about you guys, but I felt that Isaac Cheong could be right. The question did contain an error...

Section B: the question regarding the yield of the salt NaBr.

It was stated that the concentration of NaOH was o.8mol dm^-3...
and the volume of the NaOH was 25.0cm³

Technically, we were supposed to divide 25.0 by 1000 to get the volume in dm³

And if you did that, the final answer you would have gotten may be 689% had you assumed the experimental yield was 14.2g...
Obviously, yields cannot exceed 100%... It's impossible in real life...


But if you used 1.42g, the answer would be much more logical - 68.9%.


I don't know what you think, but I think that question was wrong. Anyone else?


P.s.: I am trying not to reveal too much of that question so the absentees can have a fair test.