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  1. happyperson

    Physics p34 05 june 2014

    5 cycles. It was mentioned, t is for 5 so we had to take t^2 later for 5 oscillations and not for 1.
  2. happyperson

    Physics P-34 GT.

    I guess you'll loose 1 mark for that if there's ecf in the paper, i'm not sure of ecf. I got 100 something in both.
  3. happyperson

    Physics p34 05 june 2014

    Guys, what was your diameter? And the value of m and c?
  4. happyperson

    CHEMISTRY PRACTICAL 34 DISCUSSION

    yeah, it didn't mention the amount.
  5. happyperson

    Chemistry Practical 34 GT

    The loss in mass was low, some people i know even got like 2%. My loss in mass was o.o6 i guess.
  6. happyperson

    Chemistry Practical 34 GT

    What improvements did you suggest and which procedure did you favour in Q 2?
  7. happyperson

    CHEMISTRY PRACTICAL 34 DISCUSSION

    But sulphite also gives a white ppt with Ba2+ and the result was positive.
  8. happyperson

    CHEMISTRY PRACTICAL 34 DISCUSSION

    Sulfate, sulphite, zinc, magnesium, aluminium and lead.
  9. happyperson

    CHEMISTRY PRACTICAL 34 DISCUSSION

    I added 1 cm first then i added in excess.
  10. happyperson

    Chemistry Practical 34 GT

    What were the masses in Q 1 and Q 2? And titrate value also depends on the volume of HCl taken in the first step, so the range would be 25-30 i guess.
  11. happyperson

    Chemistry Practical 34 GT

    Yeah i got a very low value, i got something around 4% i guess. I don't know whether it was actually the case or i messed up in this question. What's yours?
  12. happyperson

    Chemistry Practical 34 GT

    What was the % purity in second question?
  13. happyperson

    Chemistry Practical 34 GT

    What results did you get for the the last table, in silver nitrate and NH3 section? And what was the additional test in First table?
  14. happyperson

    Chemistry Practical 34 GT

    Titrate was 26.4 i guess, and i don't think they cut marks for answers, marks are awarded for working, each part was of 1 mark and this one was of two i guess so just 1 mark would be cut. How did you get 100% ? What were the values of your mass in (a) and then in the calculation? And what were...
  15. happyperson

    Chem p34

    Paper was good. Just wanna know about ions and mass question, do tell after 24 hours.
  16. happyperson

    Chem p34

    Pencil isn't accepted as far as it is in my notice, only graphs and tables should be drawn with pencils while calculations are too be done in pen.
  17. happyperson

    Chemistry Practical 34 GT

    Paper was fine overall, not too easy but i wouldn't say it was difficult. Some things were confusing, what were the ions?
  18. happyperson

    part (d): error in measuring cylinder is o.5. In calculation % error would be 1/25* 100 (it...

    part (d): error in measuring cylinder is o.5. In calculation % error would be 1/25* 100 (it would be 1 as reading is taken twice). In pipette it would be 0.06/25*100. I hope its all clear. For one of the part i stated, i don't understand that so the one i was sure, i told that. Please see the...
  19. happyperson

    The question is about titration and determining purity of CaCO3. Performance is quite clear in...

    The question is about titration and determining purity of CaCO3. Performance is quite clear in the steps, so i'll begin with the calculation. Part c onwards: Moles of FA2= Vol (a)/ 1000* 0.5 (this ans is x) Moles of FA3= x *250/vol (a) (this ans is y), Then for next part i'm not clear let's...
  20. happyperson

    Physics p34 05 june 2014

    I know this is the physics thread but since chemistry started here so can anyone help me with Q1 part c(i) in this paper. Thanks. http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w12_qp_34.pdf
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