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Edexcel 6CH07/01- May 8th 2013 - AS Chemistry Unit 3B

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Reply 120
Avatar for KhawlaM
KhawlaM
Original post by Daniel Atieh
ANY ONEEE PLZ i need help in jan 2013 q 1 aiv ---why the color is not blue-black ..

When you dissolve kI+cl2-->I2+kcl
the colour of the solution is brown because iodine is formed, which is brown in solution. It only changes to blue-black if starch is added.
Original post by KhawlaM
When you dissolve kI+cl2-->I2+kcl
the colour of the solution is brown because iodine is formed, which is brown in solution. It only changes to blue-black if starch is added.

oh yea thx a lot ...also explain to me q4aii
The first MCQ for today's BIOLOGY paper. Was the first answer C?
Sorry for posting it here but the other thread is closed.


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Reply 123
Avatar for ramanan
ramanan
yes :smile:
Original post by ramanan
yes :smile:

ok for the economic issue i wrote paragraph 9...wbu?
Reply 125
Avatar for KhawlaM
KhawlaM
Original post by Daniel Atieh
oh yea thx a lot ...also explain to me q4aii

I didn't understand the answer, but the answer should be:
the reaction is too slow, less HBr is formed and therefore low yield.
Original post by KhawlaM
I didn't understand the answer, but the answer should be:
the reaction is too slow, less HBr is formed and therefore low yield.

yes but why less HBr...will water react with anything or what? am not getting it rlly
Original post by Gunner121
Thank you so much to all of you :
leafy9
Relaxedexams
Sweet Strawberry (funny name you got )


Lol gunner121 the username field kept rejecting all the names I put in and I was eating strawberries at the time so I thought why not?! ;D


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Reply 128
Avatar for Munchee
Munchee
6
Any predictions for which Experiments are most likely to come????
Reply 129
Avatar for qstar
qstar
best of luck everyone. hope everyone will do well, including me.
Original post by Munchee
Any predictions for which Experiments are most likely to come????


Test for ions and organic chemistry. Those two for sure :wink:

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the difference between fractional distillation diagram and the distillation diagram is the fractionating cloumn. So you just have to draw circles to fill up the fractionating column.
Reply 132
Avatar for muf_mur
muf_mur
19
good luck everyone
118138031-Edexcel-Chemistry-Unit3B-Notes.pdf

Might help
Reply 134
Avatar for Munchee
Munchee
6
Original post by Relaxedexams
Test for ions and organic chemistry. Those two for sure :wink:

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THANKS!!
Reply 135
Avatar for *Mariya*
*Mariya*
What's the preparation of a double salt?
Reply 136
Avatar for qstar
qstar
Original post by *mariya*
what's the preparation of a double salt?


i don't even know what's a double salt!!!! :redface:
Reply 137
Avatar for Gunner121
Gunner121
Original post by Sweet Strawberry
Lol gunner121 the username field kept rejecting all the names I put in and I was eating strawberries at the time so I thought why not?! ;D


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lol , hope you stay sweet for the whole month!
Reply 138
Avatar for leafy9
leafy9
11
So, before I go off to do my next unit 3 (physics) I'll just ask: How did everyone do?




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Original post by Gunner121
lol , hope you stay sweet for the whole month!


Hey of course I'll stay sweet forever! :wink:


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