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Search results

  1. i_try9621

    Chemistry: Post your doubts here!

    From 52/M/J/16 . Anyone please explain 1) a)?
  2. i_try9621

    Chemistry: Post your doubts here!

    Is your P3 exam tomorrow?
  3. i_try9621

    Chemistry: Post your doubts here!

    (0.5-0)/50 = 0.01 x 100 = 1% We used the measuring cylinder to transfer 150cm^3 of Hydrogen Peroxide so each time there is an uncertainty of 1% . In this case , it's 3 times so it's 3%
  4. i_try9621

    Chemistry: Post your doubts here!

    Thanks for that
  5. i_try9621

    A-level Chemistry book VERY urgent!!!

    I am not sure If you will find it but I suggest that you buy a hard copy( If you can afford it, it's quite cheap) from Amazon. I tried finding it online but unsuccessful, so I bought the hard copy. This book is worth every penny.
  6. i_try9621

    Chemistry: Post your doubts here!

    Anyone help me with the questions please?
  7. i_try9621

    Chemistry: Post your doubts here!

    I think I found my mistake in there . Just to clarify, this is reduction of Amide to Amine yes?
  8. i_try9621

    Chemistry: Post your doubts here!

    I mean from C=O bond to C-OH bond or Am I wrong?
  9. i_try9621

    Chemistry: Post your doubts here!

    Someone help me with this please? I have a problem with understanding what test 1 and test 5 is for . Also which test is for Amine and Amide here?
  10. i_try9621

    Chemistry: Post your doubts here!

    Anyone please help me with V and W ? Shouldn't Oxygen be replace with O-H bond ?
  11. i_try9621

    Chemistry: Post your doubts here!

    Anyone gave CIE P3 practical yesterday?
  12. i_try9621

    Chemistry: Post your doubts here!

    Anyone know how to solve this question. I am mainly having trouble with how they set up the equation. It's from 42/F/M/16.
  13. i_try9621

    Chemistry: Post your doubts here!

    Using the electrode potential you can figure out an equation this way. Follow the arrows and you eliminate the electrons giving one-way reaction
  14. i_try9621

    Chemistry: Post your doubts here!

    I don't think you have to measure the exact spectra, your answer is right if you have taken your values from the Data Booklet.
  15. i_try9621

    Chemistry: Post your doubts here!

    Need help with c) iv). Why are there 2 different structures? How would I know if mine is right?
  16. i_try9621

    Chemistry: Post your doubts here!

    Need help with i) and iii) from 42/M/J/16 . In i) The answer says "Asp having a charge of -2 and Val having a charge of -1" which I don't understand and in iii) The buffer pH is 12 but shouldn't it be pH 7 ?
  17. i_try9621

    Chemistry: Post your doubts here!

    Thanks for the help, I understood it now.
  18. i_try9621

    Chemistry: Post your doubts here!

    Isn't 6 and 7 the same?
  19. i_try9621

    Chemistry: Post your doubts here!

    Guys I need help
  20. i_try9621

    Chemistry: Post your doubts here!

    I need help with this. From March 2017 Paper 4 I only get 6 different carbon environments
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