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how was chem. p5

Discussion in 'International A And AS Level' started by leadingguy, May 21, 2012.

?

how much do u expect in chem. p5??

Poll closed May 28, 2012.
  1. >25

    10.2%
  2. >20

    55.9%
  3. >15

    27.1%
  4. 10 - 15

    6.8%
  1. leadingguy

    leadingguy

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    cast ur vote abt chem. p5 . variant 52
    was the paper easy or hard according to ur prospective??
     
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  3. leadingguy

    leadingguy

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    the paper was lendy a bit difficult too.
    ALHAMduLLiLah completed, with minor errors:D
     
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  4. princesskt

    princesskt

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    yeah paper was difficult+lenghty and d/f also.........
     
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  5. ilhanmansitz

    ilhanmansitz

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    i never liked that first question....can sm1 pliz show me hw it was done
     
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  6. leadingguy

    leadingguy

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    yes it was diff. frm previous ones:D
     
  7. leadingguy

    leadingguy

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    cast ur vote guys what are U expecting??
     
  8. leadingguy

    leadingguy

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    yah what u wanna ask abt ?? any particular thing??
     
  9. ilhanmansitz

    ilhanmansitz

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    the plannin part......am going 2 get anythin....pliz show me hw it was done......my hnds r tremblin remembrin dat question
     
  10. hassam

    hassam

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    last two parts most difficlt
     
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  11. princesskt

    princesskt

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    were we supposed to write values in table .............
    were there were two graphs for ques 1
     
  12. Goodfella

    Goodfella

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    Went pretty well, expecting 25+, paper was sort of easy when compared to the previous ones
     
  13. leadingguy

    leadingguy

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    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
     
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  14. smzimran

    smzimran

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    It was a different paper from the previous years!
    But not too difficult, altough i will not say it was easy!
     
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  15. princesskt

    princesskt

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    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.......
     
  16. ousamah112

    ousamah112

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    it was normal.
     
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  17. ousamah112

    ousamah112

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    i used water bath instead.. was that okay??
     
  18. leadingguy

    leadingguy

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    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
     
  19. smzimran

    smzimran

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    I used oil bath, yes both are ok!
     
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  20. ousamah112

    ousamah112

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    curve or straight line in q2??
     
  21. smzimran

    smzimran

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    leadingguy: Edit the title, write chem paper 52, otherwise those giving 51 or 53 would also enter! ;)
     
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