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  1. Scafalon40

    Chemistry: Post your doubts here!

    For Q 11... WELL DONE! For Q17 Reaction D is one of the only one I could find in the syllabus which actually mentions that H2SO4 behaves as a strong acid and oxidising agent i.e special reference to it by the examiners! For Q6 Tricky one: it actually requires us to know about some melting...
  2. Scafalon40

    Chemistry: Post your doubts here!

    First of all, thanks Secondly, I did post a few questions at the beginning, the list just got bigger and bigger because they were not being answered But again, thankyou Comments: For Q19 Bonds are being broken and made in all the four reactions The difference between the the bond making and...
  3. Scafalon40

    Chemistry: Post your doubts here!

    But in any case you solved something! So I'll help Seems alot has already been solved since my post For Q9 It can't be A because there is 100cm^3 of solution, not 50cm^3 (1cm^3=1g) For Q 31 Sulphuric Acid does behave as an acid in ethanol: remember that alcohols are very weakly basic! Further...
  4. Scafalon40

    Chemistry: Post your doubts here!

    That question has been answered already, I'm talking about the post in colourful fonts...
  5. Scafalon40

    Chemistry: Post your doubts here!

    In my signature below:rolleyes:
  6. Scafalon40

    Chemistry: Post your doubts here!

    Lets make a deal... I'll try to help you in your problems if YOU JUST ANSWER MY QUESTIONS!:mad:
  7. Scafalon40

    Chemistry: Post your doubts here!

    Are the questions I posted two hard:( Or two easy?
  8. Scafalon40

    Potentiometer concept

    Well it's a start:) Thanks:)
  9. Scafalon40

    Chemistry: Post your doubts here!

    Somebody solve this http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w11_qp_11.pdf Q8 M.Shttp://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w11_ms_11.pdf
  10. Scafalon40

    Chemistry: Post your doubts here!

    Dude solve my questions too
  11. Scafalon40

    Potentiometer concept

    Wait...um...rephrase that please "you adjust the voltage of the potentiometer until there is no current at all" Why so? I'm pretty sure it's some basic concept that I'm ignoring...
  12. Scafalon40

    Chemistry: Post your doubts here!

    http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w11_qp_11.pdf Q8,19,27 M.Shttp://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w11_ms_11.pdf 11) 0.144 g of an aluminium compound X react with an...
  13. Scafalon40

    Potentiometer concept

    Why is the current in the cell zero?
  14. Scafalon40

    Chemistry: Post your doubts here!

    11 In which change would only van der Waals’ forces have to be overcome? A evaporation of ethanol C2H5OH(l) → C2H5OH(g) B melting of ice H2O(s) → H2O(l) C melting of solid carbon dioxide CO2(s) → CO2(l) D solidification of butane C4H10(l) → C4H10(s) Ans C Why is it not D? Butane is also non...
  15. Scafalon40

    Indicator colour changes

    I need to know the colour changes for the following: Methyl Red Methyl Orange Bromophenol Bule In: 1)An acidic medium 2)An alkaline medium 3)Neutral solution
  16. Scafalon40

    Potentiometer concept

    Know that formula. Thank you anyway.
  17. Scafalon40

    Potentiometer concept

    Somebody else?:( ANYBODY!:cry: I need help:unsure:
  18. Scafalon40

    Calculator not allowed ??

    991 es is allowed, it follows regulations Graphical calculators, which can plot graphs, have a programming function and algebraic manipulation ability are not allowed Trust me guys, I have both casio fx 9860 g2(http://www.casio.com/products/Calculators_&_Dictionaries/Graphing/FX-9860GII/) and...
  19. Scafalon40

    Potentiometer concept

    This is the nearest I got to an explanation: http://www.s-cool.co.uk/a-level/physics/kirchoffs-laws-and-potential-dividers/revise-it/using-potential-dividers-to-find-emf Would somebody like to elaborate it please. Bear with me guys, this is the only concept from the syllabus which I don't...
  20. Scafalon40

    Potentiometer concept

    Absolutely not; you took that straight out of a book and explains nothing I don't already know. I need stuff like "why is the current in the test cell zero.." etc Quite a lot actully Longman Advanced Level Physics Cambridge AS and A2 Physics Coursebook A level Physics by Nelkon and Parker AS/A...
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