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Discussion in 'International A And AS Level' started by leadingguy, May 21, 2012.
cast ur vote abt chem. p5 . variant 52
was the paper easy or hard according to ur prospective??
the paper was lendy a bit difficult too.
ALHAMduLLiLah completed, with minor errors
yeah paper was difficult+lenghty and d/f also.........
i never liked that first question....can sm1 pliz show me hw it was done
yes it was diff. frm previous ones
cast ur vote guys what are U expecting??
yah what u wanna ask abt ?? any particular thing??
the plannin part......am going 2 get anythin....pliz show me hw it was done......my hnds r tremblin remembrin dat question
last two parts most difficlt
were we supposed to write values in table .............
were there were two graphs for ques 1
Went pretty well, expecting 25+, paper was sort of easy when compared to the previous ones
what I can conclude is that u have to take fixed mass of ammonim nitrate and heat it. the gas which wil evolve, wil contain no2 and h20 vapurs
by installing liebeg condesor we can condense water molecules.
the remaing will be no2 gas it should be coolected in syringe.
we have to show the volume of syringe gas with respect to the mass/ moles of ammonim nitrate we used. using eq. given at frst page.
lets suppose u took 1.0g of AMMONIUM nitrate means u have taken 0.0125 moles of it
now molar ratio is 1 : 1 of ammonium nitrate and NO2 so same moles wil be produced of No2 convert them to the volume
there wil be 300cm^3 of volume of No2 to be collected
repeat the experiment to get a set of values to plot a graph
thats what i think
It was a different paper from the previous years!
But not too difficult, altough i will not say it was easy!
hey.....how would you collect water using liebeg condesor...wont it fall back in the boiling tube.....it was written how it will be collected.......
it was normal.
i used water bath instead.. was that okay??
when the gas wil evolve it wil move through the pipe covered with crushed ice(liebeg condensor).
this wil condense the water vapours to the drops of water. those drops wil fal down and u can collect them in a flask.
wheras, on condensing the gas no2 which is gas at rtp wil remain gas and u can collect it by installing a syringe at the end of the condensor
I used oil bath, yes both are ok!
curve or straight line in q2??
leadingguy: Edit the title, write chem paper 52, otherwise those giving 51 or 53 would also enter!
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