Qualification > Queries
Some likely topics in CIE A level chem.paper2?
MaNi_DaDuDe:
omg
what did you guys find hardest in the paper?!
wunderkind:
--- Quote from: raunaqbhatia on November 03, 2009, 03:05:09 pm ---People we need to discuss chem ! ok anyways wats.
Q. Define Ionic radius ?
Q. tell me all you can tell me about complex ions ?
Q Al2O3 + H20 -> ??????
Q.Al2o3 +NaOH -> ???
--- End quote ---
1 - distance from the nucleus to the outermost electron
note:- Al2O3 is amphoteric so it can act as both an acid and a base depending on wat it reacts with. so acid + base = salt + water
3 - Al(OH)3 + H2O ==> got this from wiki because i wasn't sure
4 - NaAl04 + H2O
neo_park:
--- Quote from: wunderkind on November 04, 2009, 12:21:21 am ---
3 - Al(OH)3 + H2O ==> got this from wiki because i wasn't sure
--- End quote ---
Al2O3 + 3 H2O ? 2 Al(OH)3
the one u wrote was almost correct, do be careful dat u can't have H2O on both sides of da equation
Sorceres:
--- Quote from: MaNi_DaDuDe on November 04, 2009, 12:11:13 am ---omg
what did you guys find hardest in the paper?!
--- End quote ---
omfg the first 2 questions were a killer..
polaroidsoflove:
--- Quote from: Sorceres on November 04, 2009, 07:11:21 am ---omfg the first 2 questions were a killer..
--- End quote ---
What were the topics?
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