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  1. Ariel Robert

    Chemistry and Physics some Keypoints/Notepoints (onDemandOnly) !! :)

    And there are reactions with phenols in our syllabus...
  2. Ariel Robert

    Chemistry and Physics some Keypoints/Notepoints (onDemandOnly) !! :)

    Whats the Eqution of Iodoform Test, with propanone or propanal?
  3. Ariel Robert

    Chemistry and Physics some Keypoints/Notepoints (onDemandOnly) !! :)

    Its there in organic chemistry, reactions of phenols...
  4. Ariel Robert

    Chemistry and Physics some Keypoints/Notepoints (onDemandOnly) !! :)

    Whats the reagent used to change phenol to benzene?
  5. Ariel Robert

    Chemistry Paper 4-theory- doubts =D

    Even Im Doing AS and Alevel on Maths, Physics and Chemistry...
  6. Ariel Robert

    Chemistry Paper 4-theory- doubts =D

    "E.N. Ramsden" This book is being used in my school for years, and made 90% students pass... http://books.google.com.sa/books/about/A_Level_Chemistry.html?id=ZCkKH4bUcPUC&redir_esc=y
  7. Ariel Robert

    Chemistry Paper 4-theory- doubts =D

    Walaikum Assalam I don't have the orange text book, but i have the fat golden textbook But i know a friend who has the orange one, and orange one is good for definitions, but the golden one is good for explanations... :P And im not a brother... :P
  8. Ariel Robert

    How was Chemistry P5?

    Which varient are you?
  9. Ariel Robert

    Chemistry Paper 4-theory- doubts =D

    Aneways you guys keep Posting your doubts and ill try to solve more, I jus ♥ Chemistry...
  10. Ariel Robert

    Chemistry Paper 4-theory- doubts =D

    Im going now, plus i live in Jeddah, the time here is the time to sleep, i just came back to solve the problem, orelse ill forget later...
  11. Ariel Robert

    Chemistry Paper 4-theory- doubts =D

    Ok guys i found the problem, Gémeaux way is correct, but there also another way where you have to change the sign and add all of them, not like E(left) - E(right), you just add all of them, Last year i remember me and my friend had a fight on this thing...
  12. Ariel Robert

    Chemistry Paper 4-theory- doubts =D

    Aneways i have to go to sleep now i will show you how its done after i come back :P
  13. Ariel Robert

    Chemistry Paper 4-theory- doubts =D

    ok i have question for you the potential for Ag^+1 + 1e -> Ag is +0.80 what's the potential for Ag -> Ag^+1 + 1e ?
  14. Ariel Robert

    Chemistry Paper 4-theory- doubts =D

    The sign does change, you check again...
  15. Ariel Robert

    Chemistry Paper 4-theory- doubts =D

    Even the book is correct but i use KCl cuz its easy to understand...
  16. Ariel Robert

    Chemistry Paper 4-theory- doubts =D

    if you took an element with a potential of +0.52 and another one with -0.04, The voltage will be +0.52-(-0.04) = 0.56V And if you take the +0.52 again but take another one which will give more voltage like -0.44, the voltage now will be higher = 0.96V, this way you can increase the voltage of a...
  17. Ariel Robert

    Chemistry Paper 4-theory- doubts =D

    For a half equation the sign will only change when the equation changes the other way round... and hope you know that the salt bridge is KCl... In your diagram the equation for sulphur is S + 2e -> S^-2 so you must find the potential of this if in the data booklet is the other way round then...
  18. Ariel Robert

    Chemistry Paper 4-theory- doubts =D

    First order is when the concentration increase and the rate of reaction increases to a ratio of 1:1 2nd order 1:2 3rd order 1:3
  19. Ariel Robert

    Chemistry Paper 4-theory- doubts =D

    No it depends on their concentrations, comparing their concentration and rate of reaction you can find out if they are first second or third order...
  20. Ariel Robert

    Chemistry Paper 4-theory- doubts =D

    It's just a test... :D :P
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