• We need your support!

    We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
    Click here to Donate Now (View Announcement)

Recent content by Kinjal

  1. K

    *Biology Paper 5 tips*

    Hi guys.. I jus read about all the error bars discussion. According to what you're saying,we multiply 2 with the value of stadard error and then plot it right? Then why does the ms of w10 53,qn 1c) (iii) say you jus take +/- stndrd error? It also says accept +/- stndrd deviation! :S Im really...
  2. K

    Paper 5 Tips !! :)

    Ur welcome! :)
  3. K

    Paper 5 Tips !! :)

    The expression is (vol of acid+vol of alkali)x4.3x(change in temp) / moles of NaOH This is because enthalpy change of neutralization is per 1 mole of H2O. And according to the equation,moles of H2O=moles of NaOH..i.e its 1:1
  4. K

    Paper 5 Tips !! :)

    Yeah,its good to show them when your graph dsnt start at (0,0)
  5. K

    Paper 5 Tips !! :)

    Yeah exactly..it makes sense.. Thanks a lot guys! :)
  6. K

    Paper 5 Tips !! :)

    Yeah,thats exactly how my table looks aswell..
  7. K

    Paper 5 Tips !! :)

    For calculating the solubilities i took mass of the solid,which for the first case,is 77.9 .Then I divided it by the mass of the water which is 43.5,for the first one. So the solubility is that times a 100,so my first solubility is 179. Is that wrong? What are you supposed to do then??
  8. K

    Paper 5 Tips !! :)

    Omg,thankyou soo much!!! Turns out my coordinates were correct,i just drew curves instead of lines! :/ Yes,i was really stressed out after doing this qn! Really helped! Thanks again! :)
  9. K

    Paper 5 Tips !! :)

    Yeah exactly,i did get two curves and when i checked with the marking scheme, it says that the first line (at lower temp) has a steeper gradient and vice versa while i got the oppposite. Is the transition temp around 49C?? Plus all my solubilities were above 100! Is that corrct??
  10. K

    Paper 5 Tips !! :)

    Hi everyone.. I needed help with this ppr..Qn 2 the graph..either how the graph looks or only the coordinates will also be very helpful.. Pleasee help ASAP! http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s09_qp_5.pdf
See more
Top