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    Anyone know where I can find the June 2007 'Foundation' paper mark scheme?
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    Name:  chemdip.png
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    Can someone explain why dipole dipole is the answer

    --> If this was NH4+, or CH4, there wouldn't be any dipoles because the molecule is surrounded by the same delta charge, so another molecule cannot be attracted to it as the like charges on the outside of each molecule will repel them away.

    However, with CCl2F2, there is dipole-dipole formation. Why? Is it because of the polarity difference between C-F and C-Cl?
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    (Original post by LibertyMan)
    Name:  chemdip.png
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    Can someone explain why dipole dipole is the answer

    --> If this was NH4+, or CH4, there wouldn't be any dipoles because the molecule is surrounded by the same delta charge, so another molecule cannot be attracted to it as the like charges on the outside of each molecule will repel them away.

    However, with CCl2F2, there is dipole-dipole formation. Why? Is it because of the polarity difference between C-F and C-Cl?
    Fluorine is more electronegative so gets the delta negative forming a dipole so there is attraction between the opposite charges
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    (Original post by Poole & The Gang)
    Fluorine is more electronegative so gets the delta negative forming a dipole so there is attraction between the opposite charges
    Yes but C-Cl is also polar, and Cl has a negative dipole, and prevents the delta positive charge from interacting with any other molecule?
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    (Original post by TeaAndTextbooks)
    Can someone explain the electrophillic addition of bromine water to cyclopentene? Thanks

    Posted from TSR Mobile
    I think this is how you do it. I may have an arrow wrong way round though, I don't think I do though, maybe someone can verify?
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    (Original post by TheNoobishKnight)
    I think this is how you do it. I may have an arrow wrong way round though, I don't think I do though, maybe someone can verify?
    Love it
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    (Original post by C0balt)
    Love it
    lol thanks doing bio revision atm so had to do it quick :P.
    So much darn mechanisms i keep confusing them with A2 stuff lol.
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    Thank you so much, I really needed a diagram and I appreciate this art work lol 😁

    Posted from TSR Mobile
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    (Original post by NotoriousS)
    Yes I am
    It's tomorrow! :-(
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    im reallly scared im doing edexcel unit 1 and apparently its gonna be the R paper
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    Did anyone else think the AQA EMPA was really really hard?
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    (Original post by Rstlss)
    me
    hiiii
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    (Original post by LibertyMan)
    Name:  chemdip.png
Views: 147
Size:  130.3 KB

    Can someone explain why dipole dipole is the answer

    --> If this was NH4+, or CH4, there wouldn't be any dipoles because the molecule is surrounded by the same delta charge, so another molecule cannot be attracted to it as the like charges on the outside of each molecule will repel them away.

    However, with CCl2F2, there is dipole-dipole formation. Why? Is it because of the polarity difference between C-F and C-Cl?
    And it burns, burns, burns (tabs!)
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    (Original post by Mr.bob)
    And it burns, burns, burns (tabs!)
    I'll burn you if you don't answer my question
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    (Original post by Shadowfire123)
    hiiii
    yeah?
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    (Original post by Shadowfire123)
    im reallly scared im doing edexcel unit 1 and apparently its gonna be the R paper
    What's the R paper? any difference?
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    (Original post by NotoriousS)
    What's the R paper? any difference?
    International paper, same content but slightly harder for some reason
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    Any likely Q's ???
    Im really dreading this paper
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    Could anyone tell me what chemical tests we may need to know? AS Edexcel unit 1
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    (Original post by NotoriousS)
    What's the R paper? any difference?
    How do you know this?
 
 
 
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