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    (Original post by celiajacobs)
    In the F331 exam for the double beta decay question I wrote for the answer '^0-1ß + ^0-1ß' will I lose the marks?
    I'm not sure, i did this too,

    I think 1 mark will be lost. But is not wrong.

    Ps. Don't worry bout F331 now. Its done. F332 is where its at now
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    (Original post by vuvuzela)
    I'm not sure, i did this too,

    I think 1 mark will be lost. But is not wrong.

    Ps. Don't worry bout F331 now. Its done. F332 is where its at now
    why is that wrong?
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    (Original post by SSD07)
    why is that wrong?
    Its not wrong as i said. The problem is this is salters. So if you are totting up marks, trivial things like this knock off a mark. Could be right coukd be wrong
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    Sorry one last question, I got really confused about what was being asked on the silicate question and wrote Si4+, would I not get the mark for that either?
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    (Original post by celiajacobs)
    Sorry one last question, I got really confused about what was being asked on the silicate question and wrote Si4+, would I not get the mark for that either?
    No it's wrong. 0
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    (Original post by vuvuzela)
    No it's wrong. 0
    Okay thankyou!
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    (Original post by celiajacobs)
    Okay thankyou!
    Was it Si4-?
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    (Original post by vuvuzela)
    Its not wrong as i said. The problem is this is salters. So if you are totting up marks, trivial things like this knock off a mark. Could be right coukd be wrong
    Yeah but I don't see why they would knock a mark off, that's what I'm saying, like what would have been the perfect answer??
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    (Original post by charlie7knight7)
    Was it Si4-?
    SiO3 2-

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    Anyone got any idea what long questions might come up on F332?

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    (Original post by Forceflow1)
    Anyone got any idea what long questions might come up on F332?

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    Probably the greenhouse effect one and the ozone one because they come up almost every year.. and maybe they might give 2 compounds and ask us to discuss their intermolecular forces and why one is dissolving in water and why the other is not and why one is stronger than the other etc..
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    This comes up in the OCR B Salters spec, anyone know what it means / how you would answer it??? Its talking about electrophilic addition mechanism

    "explain how the products obtained when other anions are present confirm the model of the mechanism"
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    (Original post by SSD07)
    This comes up in the OCR B Salters spec, anyone know what it means / how you would answer it??? Its talking about electrophilic addition mechanism

    "explain how the products obtained when other anions are present confirm the model of the mechanism"
    I believe it's referring to the carbocation intermediate being attackable by both Cl- and Br- in electrophilic addition

    Happens when Br2 undergoes electrophilic addition while Cl- is present

    Probably would still occur in most mechanism tho
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    I remember when I did this exam. Memories

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    (Original post by lyricalvibe)
    I believe it's referring to the carbocation intermediate being attackable by both Cl- and Br- in electrophilic addition

    Happens when Br2 undergoes electrophilic addition while Cl- is present

    Probably would still occur in most mechanism tho
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    would you mind explain that further in more detail?? i really don't get it. thanks, appreciate it
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    (Original post by SSD07)
    would you mind explain that further in more detail?? i really don't get it. thanks, appreciate it
    No problem
    Flag me on whichever parts your unclear on
    The dashed arrows i don't think are official chemistry but are to show possible electron movements so i could do both mechanisms in 1 drawing

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    Anyone have the 2014 paper?

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    (Original post by lyricalvibe)
    No problem
    Flag me on whichever parts your unclear on
    The dashed arrows i don't think are official chemistry but are to show possible electron movements so i could do both mechanisms in 1 drawing

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    Thankyou so much, that helps a lot!! how does that "confirm the model" though?? does it just prove the fact that a carbocation is formed as an intermediate?
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    (Original post by SSD07)
    Thankyou so much, that helps a lot!! how does that "confirm the model" though?? does it just prove the fact that a carbocation is formed as an intermediate?
    Yeah. we can't directly capture the carbocation to prove the mechanism because it's an intermediate (used up straight after being produced). So by cl- reacting as well is evidence that they a carbocation is there.

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    Anyone got any stuff or predictions for the Advanced Notice?
 
 
 
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