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**Chemistry...Before/After
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Yes, no and no :pac:
My hopes are ethene/ethyne, water of crystallisation and a rate of reaction question
Water of crystallisation would be handy aswell cus I just learned how to do the big calculations at the end :L. Ethene and ethyne are grand aswell, but someone said ethyne with yields? I never knew there was calculations in ethyne. Rates of reaction is probably nicest experiment there is, 18 marks for graph.
Does anyone else study experiments by just doing the exam questions of em that came up? If anything outside those past questions comes up on an experiment, I'm screwed :L. I just basically learn off old answers!0 -
The only difference is Br+ ion forms a shared bond with both carbons while with HCL, H+ only forms a bond with one of them.
Also when the Br- ion joins on, each Br atom is only bonded to one carbon.
You don't have to do that weird shape when your doing the normal Br one :pac: I do it the exact same for both of them 0 -
Water of crystallisation would be handy aswell cus I just learned how to do the big calculations at the end :L. Ethene and ethyne are grand aswell, but someone said ethyne with yields? I never knew there was calculations in ethyne. Rates of reaction is probably nicest experiment there is, 18 marks for graph.
Does anyone else study experiments by just doing the exam questions of em that came up? If anything outside those past questions comes up on an experiment, I'm screwed :L. I just basically learn off old answers!
youll be able to get over 40 learning that way at least!0 -
Water of crystallisation would be handy aswell cus I just learned how to do the big calculations at the end :L. Ethene and ethyne are grand aswell, but someone said ethyne with yields? I never knew there was calculations in ethyne. Rates of reaction is probably nicest experiment there is, 18 marks for graph.
Does anyone else study experiments by just doing the exam questions of em that came up? If anything outside those past questions comes up on an experiment, I'm screwed :L. I just basically learn off old answers!
Same. It's bound to catch me out somehow but I think I'm only doing 2 of the 3 experiments and 6 regular questions.0 -
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It's the one that I always skip :L after seeing this, spose I'll have quick look over it.
Ethanal, Winkler and Volatile Liquid :cool:Yes, no and no :pac:
My hopes are ethene/ethyne, water of crystallisation and a rate of reaction question
Any of these would be beautiful for me 0 -
Water of crystallisation would be handy aswell cus I just learned how to do the big calculations at the end :L. Ethene and ethyne are grand aswell, but someone said ethyne with yields? I never knew there was calculations in ethyne. Rates of reaction is probably nicest experiment there is, 18 marks for graph.
Does anyone else study experiments by just doing the exam questions of em that came up? If anything outside those past questions comes up on an experiment, I'm screwed :L. I just basically learn off old answers!
Me too Ethyne with yields? :L Must have meant ethanal/ethanoic acid..
Yea thats all I do
Sure theres not that much else they can really ask ye.. 0 -
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ChemHickey wrote: »No no, I mean ethyne/ethene. They can make a yield on any organic. It is standard work though.
I would panic so much if they came up
. I'm only used to naming the solid X and giving its colour!! 0 -
Ones that came up last year or soap better not come up :mad: or ones you wouldn't expect to come up, like test for anions or Le Chateliers...
Test for anions are alright.. they were a full question along with flame tests on 2009. I'd say they could come up in Q11 though.I would panic so much if they came up. I'm only used to naming the solid X and giving its colour!!
Haha, it's actually stupid how easy them questions are..0 -
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ChemHickey wrote: »Well the calculation would be almost identical to the other yields!
THIS ISNT MEANT TO BE IN THIS QUESTION :pac: :pac:
Like ethanal yield:cool:? 0 -
THIS ISNT MEANT TO BE IN THIS QUESTION :pac: :pac:
Like ethanal yield:cool:?
Ya like those yields but the question would be
A group of students went about a process to make ethyne from solid X by dousing it in liquid Y. If 2.5g of Solid x was used and only 1.75cm^3 of a gas was produced (given density = xyz) what is the theoretical yield of the gaseous vapour formed.
^Just mad it up but it's possible.0 -
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Right so I need a C1 in this tomorrow...Got a D3 in the mocks and have worked my ass off to get better at Chemistry. I feel I have improved a lot but I keep getting the feeling all the effort will not be worth it...:( Sorry for the really pessimistic post. Ah well shure lets hope all goes well! 0
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Right so I need a C1 in this tomorrow...Got a D3 in the mocks and have worked my ass off to get better at Chemistry. I feel I have improved a lot but I keep getting the feeling all the effort will not be worth it...:( Sorry for the really pessimistic post. Ah well shure lets hope all goes well!
Good Luck! You'll be fine! 0 -
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HeaneyBabe wrote: »i'm just wondering are all the people who are hoping for and will probably obtain an A1/A2 just smart at everything or is it just chemistry? I know I certainly could achieve an A1 in my language, but i find science more difficult.
I'd just be very mathematical/sciencey. I do quite well in German but I think that's mainly because it's quite logical and suits my mathematical side. I tend to do fairly well in English too but I don't enjoy it in the least, it's only because I study for it that I'd do well. I could put in much less time for chemistry/biology and do better because I just really like science.
Hopefully that didn't come across like I was saying I'm great at everything because that's not what I mean at all
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Flame tests are great though 
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