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    (Original post by yodawg321)
    Yeah I got giant and covalent.

    I might be wrong though!
    I think we're right. Did you get 16 for the value of x in the question with xH2O?
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    (Original post by yodawg321)
    Yeah I got giant and covalent.

    I might be wrong though!
    For the last part of the question, my responses were giant, covalent, positive lithium ions and a sea of delocalised electrons, a shared pair of electrons and fluorine atoms.


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    (Original post by yodawg321)
    For last question

    Li: Between delocalised electrons and positive ions
    Carbon: Between carbon atoms in structure
    Flourine: Between flourine molecules as its van der waals forces
    you fit all that in a the tiny box:confused:
    i just drew 2 circles with li in each of them
    for the lithium one
    oh well, im keeping all my notes for a resit
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    What was the answer to the litmus paper one?


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    (Original post by MathsNerd1)
    Same here! As the lone pair of electrons would make it a polar substance.


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    wouldnt the 3 hydrogens cancel the dipoles though??
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    (Original post by Dr. Django)
    wouldnt the 3 hydrogens cancel the dipoles though??
    Only if the molecule was symmetrical which it shouldn't be because of the lone pair.


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    (Original post by KatiexZoe)
    What was the answer to the litmus paper one?


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    I put the litmus paper turned red as Chloric acid and HCL was formed and litmus paper turns red in contact with acid
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    (Original post by Ferrari_1996)
    I think we're right. Did you get 16 for the value of x in the question with xH2O?
    I did.


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    (Original post by MathsNerd1)
    Only if the molecule was symmetrical which it shouldn't be because of the lone pair.


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    good point, I've dropped 1 or 2 then. I think i've got 56 which is hopefully enough for 80+/90 UMS
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    (Original post by MathsNerd1)
    Same here but wouldn't it be dipoles as phosphorus is more electronegative than hydrogen?


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    polarity only occurs when there's a big enough (which is pretty small really) difference in electronegativity. The difference between P and H is too small...about 0.01. It's basically Non-polar...

    Vander waals' forces should be the correct one.

    I think
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    (Original post by yodawg321)
    Surely it will be VDW forces if it was non polar ? For example H2.
    But both the molecules had different electronegativies so it will be perm dipole to dipole attractions?
    What's H2.? Do you mean H2O?


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    (Original post by MathsNerd1)
    I did.


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    I don't know how but I got 2 :L


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    http://answers.yahoo.com/question/in...1145542AA0CKAv
    in regards to the nh3 and ph3 qeustion
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    (Original post by MathsNerd1)
    Only if the molecule was symmetrical which it shouldn't be because of the lone pair.


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    would VDW defo not be right?
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    could someone please do an unofficial marksheme???:rolleyes:
    i need to know how many marks i got
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    (Original post by Dr. Django)
    would VDW defo not be right?
    VDW is definitely right.

    Screw it, I don't even know.
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    (Original post by MathsNerd1)
    I did.


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    I got 16 too .

    For the Amount of molecules question did people do mass/ MR to get mmoles and times the moles by Avogrados Constant to get number of molecules?
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    (Original post by yodawg321)
    I put the litmus paper turned red as Chloric acid and HCL was formed and litmus paper turns red in contact with acid
    Same, but some people said the question is '"which ions" so they put the H+ ions in the HCLO caused the colour change. Not entirely sure which one is right though.
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    (Original post by KatiexZoe)
    What was the answer to the litmus paper one?


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    I wrote that the litmus paper turned blue because an alkali was formed (or something like that). I don't know what the answer is but that's what I wrote. What did you write?
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    (Original post by Dr. Django)
    would VDW defo not be right?
    I'm not too sure.


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