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  1. L

    Biology Practical notes!!

    @qwertysaad im sorry, im an AS student and therefore dont hav paper 5 this time, btw these notes are collected from mark schemes, just collect notes frm different years of marking schemes! :)
  2. L

    Threshold of Bio AS practical P31 ?!

    i think it should be 28-29 what did ur teacher sayyyyy???
  3. L

    Help us improve XtremePapers!

    latest record....Most users ever online was 222 on Wed May 11, 2011 4:38 pm
  4. L

    BIO 31 discussion

    the time was increasing as the conc. was decreasing , right??????
  5. L

    BIO 31 discussion

    yeah there were only differences
  6. L

    bio p3!!

    so guys, how did ur bio pract. 31 go???
  7. L

    CHEMISTRY TITRATION HELP

    @ihatephysics http://www.xtremepapers.me/CIE/Internat ... _ms_31.pdf in this markscheme it says to the nearest 0.05cm^3 which is 2 d.p!!
  8. L

    CHEMISTRY TITRATION HELP

    how come 3d.p?? u can write like 34.555?!!? can u plz send me the link of that marksheme please...
  9. L

    Bio practicals Paper 31

    practice plant diagrams!! and there might be serial dilution!! and no bad language sir!! this is a forum :)
  10. L

    CHEMISTRY TITRATION HELP

    1. until u get the same reading!! if u r not getting that, do it atleast 3 times and find the average 2. 4 s.f. !! it must be to 2decimal places!!! 3. ur first titration value on the burette...the first one is the rough one 4. in the first one, yes...but in the 2nd one its not necessary! u can...
  11. L

    SERIAL DILUTION

    @ahmedrik1501 and what abt the observations and colour change???
  12. L

    Biology Practical notes!!

    are u talking abt bio practical???
  13. L

    SERIAL DILUTION

    conc. of lead nitrate (%)....amt of 1% of lead nitrate added(cm^3)... amt of distilled water added(cm^3)...observations after adding 4 drops of iodine
  14. L

    SERIAL DILUTION

    use this equation C1V1 = C2V2 where c1 is the initial conc of the solution (1%) c2 is the final conc u want v2 is the final volume u need and u need to find v1!! in this question..take v1 10ml and c2 as....0.75%, 0.50% and 0.25% so to make 0.75% solution...C1V1= C2V2...
  15. L

    Attendance Register

    present
  16. L

    ~~jokes?? in here?? really??

    :P
  17. L

    Chemistry intresting TOPIC new element in periodic table

    hahaha lol :ROFL: but thats not true :evil:
  18. L

    microscopy....drawings.....

    for the 4th and 5th u havent mentioned xylem and phloem, are we supposed to mention that or not??
  19. L

    microscopy....drawings.....

    Thanks alot!!! God bless u! :)
  20. L

    *~*~♦ тнᴇ αят ᴏƒ ɢяᴏᴏмɪɴɢ уᴏυя ѕᴏυʟѕ ♦~*~*

    Re: The Art of Grooming your Souls! really nice!! thanks to ALLAH!!
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