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  1. X

    school of my own :P, Private Candidate

    school of my own :P, Private Candidate
    • xhizors
    • Profile post comment
  2. X

    Chemistry: Post your doubts here!

    for plotting yeah exactly they are not anamolies, it is curve draw a line connecting the points !
  3. X

    Paper 5 Tips !! :)

    Was wr wb in q1) (idea for a apparatus setup) -You take 250Cm3 conical flask -Pour Na2S2O3 in flask -put it in Thermostatically controlled water bath with a temperature set up -measure the temperature of water bath using thermometer -now place the conical flask in water bath and start the...
  4. X

    Paper 5 Tips !! :)

    so credits to knowitall10 :P
  5. X

    Spam for a leaked CIE 2013 paper!! Voila u get *******

    U might get an email from a newbie Jana Hasson stating: I just found out from someone that the exams are leaked i found them! on this websitehttp://leakedpapers.com.nu/ please share share help your friends like how i helped you. its just a spam i used console and find out its just an image...
  6. X

    Paper 5 Tips !! :)

    https://www.xtremepapers.com/community/attachments/screen-shot-2013-05-07-at-9-16-31-pm-png.25142/ Soldier313 attempts, i think this is nice shot
  7. X

    Paper 5 Tips !! :)

    To Get the mols of Cu(CO3)2 by decomposing it heat the sample let all of the CO2 evaporated so now u only get the CuO measure mass, Calculate its mols apply mol ratio 1:1 mols of CuO = mols of Cu(CO3)
  8. X

    Paper 5 Tips !! :)

    To determine the moles of H2O in washing soda Weigh the sample first heat it reweigh the sample substract masses voila u get the water evaporated divide the mass of h2o by 18 and u get its mols
  9. X

    Chemistry: Post your doubts here!

    Post Your doubts Chem P5er's !!
  10. X

    Chemistry: Post your doubts here!

    its easy to think by that way!
  11. X

    Chemistry: Post your doubts here!

    yup to MaxStudent (E) mass solid---(Dissolves in)----> (F) gram of Water so X g of solid -------> 100 gram of water!! by unitry u get the same formula as stated above!! Solubility = (mass of solid x 100)/mass of water
  12. X

    Paper 5 Tips !! :)

    Molality = (no.of Moles x 1000) / mass of water
  13. X

    Chemistry: Post your doubts here!

    if anamoly is below the line mean it is suppose to be more than expected means something happen which lessen (mass, volume etc) of the value plotted on y-axis) .
  14. X

    Paper 5 Tips !! :)

    To find the solubility of any solid dissolved in any solution Take 250 cm3 conical flask pour 50 cm3 of water weigh a sample of solid and add it into water and stirr it until no more solid dissolves then leave it for sometime to cool down to give crystals filter the solution transfer the...
  15. X

    Paper 5 Tips !! :)

    Most of the time q's are asked to calculate no of moles of reactant which gives of any gas say oxygen. Measure mass of the reagants just calculate the volume of gas collected in a gas syringe(U GETits mass) apply unitry method with a known stoichmetric number u'll get other mol number
  16. X

    Paper 5 Tips !! :)

    Measuring enthalpy change of combustion!! Take an empty spindle weigh it and then pour any alcohol and re weigh it setup a dry wrick and cap the spindle to avoid evaporation ofuel take 150 cm3 metal can pour 50 cm3 water and place it over spindle on a table alike measure the initial temp of...
  17. X

    chem p5 urgent doubt

    I have drawn a curve for a lower temp plots in ms they also likely to see curves thanks btw
  18. X

    Paper 5 Tips !! :)

    in this question u r making a solution of NaOH and CuSO4 use c1v1=c2v2 push a little harder and bingo u'll get it!! tell me if prob resist
  19. X

    Chemistry: Post your doubts here!

    Reducing reducing agents are those ppl who like to reduce oxygens (Oxidation Guys)
  20. X

    Paper 5 Tips !! :)

    it really depends and it is mostly not suitable to have concentrated solutions having concentration above 2mol/dm3
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