Qualification > Sciences
Edexcel CHEMISTRY DOUBTS!!!!
~ Miss Relina ~:
--- Quote from: ~ Miss Relina ~ on January 02, 2012, 02:34:38 pm ---but won't it form H2CO3 instead of being more dissosiated :-\
--- End quote ---
well wait a sec............I figured it out
HCO3- has lost OH- group so considered a base that's what I think
;)
Deadly_king:
--- Quote from: ~ Miss Relina ~ on January 02, 2012, 02:37:17 pm ---well wait a sec............I figured it out
HCO3- has lost OH- group so considered a base that's what I think
;)
--- End quote ---
That's also right ;)
HCO3- is actually CO2 and OH-
KJ1995:
--- Quote from: Nelson Mandela on January 02, 2012, 02:46:59 pm ---That's also right ;)
HCO3- is actually CO2 and OH-
--- End quote ---
I get it now..Thanks :D
~ Miss Relina ~:
plz who is giong to do unit 5 or for who have already done unit 5 ???
I wanna ask about tose points and whether I really have to know specific practical procedures for them or not
eCarry out the reaction of phenol with bromine water and dilute nitric
acid and use these results to illustrate the activation of the benzene
ring
fDescribe and carry out, where appropriate (using butylamine and
phenylamine), reactions to investigate the typical behaviour of
primary amines. This will be limited to:
i characteristic smell
ii miscibility with water as a result of hydrogen bonding and
the alkaline nature of the resulting solution
iii formation of salts
iv complex ion formation with copper(II) ions
v treatment with ethanoyl chloride and halogenoalkanes, eg
making paracetamol.
I need reply plz don't just ignore me :'(
MKh:
Relina, i think these specification points relate mostly to the practical qualitative assessement but are likely to be tested in the written paper too so know them well.
Do you have the Edexcel A2 chemistry Revision Guide? See how much u have to know from there.
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