• 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)

Search results

  1. aalmuhannadi

    Chemistry: Post your doubts here!

    You can never have an answer as 1 and 3 on a multiple choice AS test! that's never one of the combination options... and the answer is 1 and 2 but I don't really understand why.. I need to know where exactly is this coordinate bond and the product formed, because it's not in the CIE chemistry...
  2. aalmuhannadi

    Chemistry: Post your doubts here!

    Here's a confusing question even my teacher had a hard time with (and it was in the AS paper 1, not A2!) 34 Silver chloride dissolves in aqueous ammonia. What happens in this process? 1 A co-ordinate bond is formed. 2 The oxidation number of nitrogen is unchanged. 3 Ammonia acts as a...
  3. aalmuhannadi

    Chemistry MCQ thread...

    A: initial: 2 moles of P equilibrium: x moles of R, therefore there must be 2x moles of Q (as the ratio of Q to R is 2:1). P will be 2-x moles (we subtract moles of R from moles of P since they are the same in equilibrium) Add them up: x + 2x + 2 - x = 2x + 2 so A is incorrect B: initial: 2...
  4. aalmuhannadi

    Samsung galaxy note 2 VS S3???which one should I choose?

    I'd recommend the S3 for all reasons and purposes UNLESS you specifically require the note e.g. you were an artist or you do a lot of sketching/note taking in your everyday life. The S3 fits the needs of the normal person generally and the note in my opinion is too big and clunky.
  5. aalmuhannadi

    Useful Websites !!!

    Anything for A-Levels?
  6. aalmuhannadi

    chem practical....

    You're welcome.. really hope that helped sorry if it was a messy explanation
  7. aalmuhannadi

    chem practical....

    Yes you have to open the burette and allow 2cm^3 to flow into the beaker and then stop, shake the beaker and see if the colour disappears when you shake it, if so then keep adding 2. Keeping on adding 2cm^3 repeatedly and shaking until you reach a point where when you shake the beaker the colour...
  8. aalmuhannadi

    chem practical....

    Typically in a titration if you keep shaking the beaker and there is no colour change (i.e. the colour remains), then that is the point at which the titre is reached. However, note that it's different between each (e.g. sometimes you need to wait a long time like if you shook and no colour...
  9. aalmuhannadi

    Aluminium compounds

    They're ionic because a metal + non-metal always form ionic compounds, isn't that the general rule? If you're unsure about any other aluminium compounds then just see if aluminium is bonded with another metal or a non-metal...
  10. aalmuhannadi

    Thanks!

    Thanks!
  11. aalmuhannadi

    Didn't do O-levels I did IGCSEs, and I got A* in all subjects :)

    Didn't do O-levels I did IGCSEs, and I got A* in all subjects :)
  12. aalmuhannadi

    Chemistry: Post your doubts here!

    I got most of it but, why did you put a 2 next to H2O and how is it an oxidising agent?
  13. aalmuhannadi

    Chemistry: Post your doubts here!

    Oh sorry for the confusion it's A not B
  14. aalmuhannadi

    Chemistry: Post your doubts here!

    It's 2V3+ + I2 + 2H2O >>> 2VO2+ + 2I- + 4H+
  15. aalmuhannadi

    Chemistry: Post your doubts here!

    Balance this equation using the oxidation number method? V3+ + I2 + H2O >>> VO2+ + I- + H+ I tried using the method but it kept stumping me, there's one step I seem to be getting wrong. I'd appreciate if someone were to show step by step how to balance it using the oxidation number method...
  16. aalmuhannadi

    Things u like and hate most ,about winters ! ?

    I love the cold breeze and the lack of Sun on most days, and also ESPECIALLY the rain... but I hate that the cold usually gives me goosebumps
  17. aalmuhannadi

    practical guides

    I wasn't aware there were any endorsed practical guides.. All the ones I found were either out of print or too outdated. All we're doing for practicals is just practicing and practicing!
  18. aalmuhannadi

    Your Favourite Subject!

    In IGCSE it used to be literature because I loved the Great Gatsby! But in AS it's chemistry, it's the most interesting subject for me, even though it's the hardest and most challenging.
  19. aalmuhannadi

    Chemistry for Aslevels. Somebody please make me learn how to show electronic configuration in boxes

    s-orbital can contain a max of 2 electrons. p-orbital contains a max of 6 (spread out into 2px, 2py and 2pz p-orbitals) and the d-orbital contains a max of 10. First you fill up the s-orbital, then the p-orbital and finally the d-orbital, however, this rule does change. Note that the 1st quantum...
  20. aalmuhannadi

    Laptop or tablet???

    What?! Please explain!
Top