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  1. M

    Chemistry Paper 61

    I don't know guys.. I'm not an expert! but there should be more than 1 answer so don't worry.. it doesn't mean ur wrong!
  2. M

    Chemistry Paper 61

    1- No more fizzing. 2- some solid appear at the bottom of the beaker.
  3. M

    Chemistry Paper 61

    For the change in OBSERVATION if silver nitrate was used, you can't explain it by using mole ratio.. You write what you OBSERVE. It's either colour changes or height of solid changes.. I'm not really sure which one is right.. Maybe both observations are right.
  4. M

    Chemistry Paper 61

    I already solved a past paper about it, they said exothermic so shut up please.
  5. M

    Chemistry Paper 61

    Method of separation? I don't remember this question at all..
  6. M

    Chemistry Paper 61

    Exothermic is also write for chemical reaction. I'm definetly sure about it.
  7. M

    Done with Chemistry Paper 6 Variant 2 (62)

    or there is a difference between volume and conc of an acid?
  8. M

    Done with Chemistry Paper 6 Variant 2 (62)

    When conc of excess acid is doubled, more particles available per unit volume so more successful collisions resulting in a steeper gradient but same volume of gas produced..
  9. M

    Done with Chemistry Paper 6 Variant 2 (62)

    You're wrong.. rate increases
  10. M

    Done with Chemistry Paper 6 Variant 2 (62)

    i know that volume of gas produced won't change but the rate of reaction increases? what about when the volume is doubled, what happened to the temperature change?
  11. M

    If you have any question on chem p6 im ready you guys. Don't Worry!!

    When an acid is in excess, if the volume is doubled, the rate of reaction increases?
  12. M

    Done with Chemistry Paper 6 Variant 2 (62)

    When an acid is in excess, if the volume is doubled, the rate of reaction increases?
  13. M

    chemistry paper6

    There you go http://www.scribd.com/mobile/doc/2310033
  14. M

    chemistry paper6

    Actually , Aqueous solutions of "copper(II) chloride". Greenish when high on [Cl–], more blue when lower on [Cl–].
  15. M

    chemistry paper6

    No its blue
  16. M

    Grade thresholds in Egypt

    If egypt is variant 1 then im in trouble.. They'll all get 100% and A* will be from 99% -.-
  17. M

    chemistry paper6

    No problem :)
  18. M

    chemistry paper6

    yes.. google it if you're not sure
  19. M

    chemistry paper6

    yeah thanks! variant 1, you?
  20. M

    chemistry paper6

    Most copper salts are blue like copper sulfate, copper chloride etc.. copper carbonate is green
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