Reason why practical apparatus leak could screw you up.

[Mayedah]

The Calculations showed it's K and as a matter of fact Examiner's of two centers also said the same. And one of that examiner told me that CIE tried students this year.

Umm i think you cannot conclude this result just on the basis of two examiner ...i took the same variant and as a matter of fact we dont have foreign invigilators and my own chem sir who has been teaching since the time you werent even born prepared all the solutions himself and after the exam he himself told me the metal was Na ! And alot of ppl also got other metal its not tht everybody got K so you say it was K ! And why would he lie to us for no reason . He will even forward me the calculations by some weeks when he gets over with the invigilation so please stop spreading such lame infos and if your teacher thinks its K then tell her to give you all the calculations for it !!

 

[stella jazz]

Dear fellow,
I am an AS Student and gave the practicals for the first time in my life, the paper leak (appratus leak ) was pretty interesting and it seemed an easy way out . But the CIE's are pretty smart, here is a list what they did:

1. Biology Practical/33 : There was Biuret solution though there wasnt any protein so they tried to confuse us.
2. Physics Practical/33: For the Question 2 they gave us a Stopwatch, which was not used anywhere. That was just to confuse anyone who got the list into thinking that they had to measure the time taken by the marble.
3. Chemistry Practical/33: here is a good one. Apparatus wa pretty much correct but in the question where we had to calculate the mass of unknown Group I metal, the answer by calculation was K while actually in the solution there was Na so anyone who had the apparatus list of solution list before had wrote "Na" metal which would result in CIE knowing that the student cheated and would most probably get a U grade (I asked my teachers they said If CIE are sure the student cheated they would give him U in Practical and some time in whole subject.)

So before relying on the Leaked paper, do complete your preparation

if the solution is Na then how can the results by calculation be for K?? i mean whatever the solution is, the calculation would result in the same metal being identified right?? how is it possible that a solution is something else and the answer something else????