Qualification > Sciences
ALL CIE CHEMISTRY DOUBTS HERE !!
Vin:
THANK YOUU SO MUCHH. :D I shall make sense out of it after my term exams. Thanks a lot, again!
Amelia:
--- Quote from: Vin on January 17, 2011, 07:47:09 pm ---THANK YOUU SO MUCHH. :D I shall make sense out of it after my term exams. Thanks a lot, again!
--- End quote ---
You are welcome. :D
Sue T:
i have an A2 ppr 5 ques
so we have this eqn:
CuCO3.Cu(OH)2.x H2O(s) ------> 2CuO(s) + CO2(g) + (x+1)H2O(g)
we're tryin 2 find x
wat i got is:
1) the mass of the basic copper carbonate (LHS) and;
2) loss in mass which is basically CO2 and H2O
there wer 2 expressions in the m.s. tht im supposed 2 use:
(221 + 18x); 44 + 18(x + 1);
ny has ny idea wat 2 do 2 find x ??
p.s. i hate paper 5. >:(
HUSH1994:
what do u need to know about isomers for AS and is knowledge about geometrical isomers needed?
Amelia:
--- Quote from: ~~!$!HUSH!$!~~ on January 21, 2011, 03:58:19 pm ---what do u need to know about isomers for AS and is knowledge about geometrical isomers needed?
--- End quote ---
According to the 2011 syllabus, you only need to know about the Optical Isomers.
Optical Isomers
When drawing a pair of optical isomers, candidates should indicate the three-dimensional structures
according to the convention used in the example below.
mirror plane
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