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Edexcel Chemistry AS Unit 2- 16th January 2013 Watch

  • View Poll Results: What did you get in the first sitting for the Unit 2 test?
    F
    2
    4.08%
    E
    5
    10.20%
    D
    9
    18.37%
    C
    9
    18.37%
    B
    14
    28.57%
    A
    10
    20.41%

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    I'm literally screwed for this exam on Wednesday, I can't remember anything from Unit 2. I think I should've picked to resit in June instead..
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    (Original post by David Tennant)
    I think the hat mechanism is an elimination reaction (electrophillic)?

    Three products are...the alkene...water and ohhh is it..not sure
    haha but-1-ene, e and z but-2-ene apparently
    and yeah elimination wooo!
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    (Original post by Weaselmoose)
    haha but-1-ene, e and z but-2-ene apparently
    and yeah elimination wooo!
    Wats de third thing you get?
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    (Original post by flightlessbirds)
    I'm literally screwed for this exam on Wednesday, I can't remember anything from Unit 2. I think I should've picked to resit in June instead..
    Hey, you can still get a good grade
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    (Original post by David Tennant)
    It won't let me copy your quote for some reason.
    PH3 has one pair of electrons and 3 bonding pairs so it would be v shaped...no I mean um trigonal pyramidal
    total pairs = 4 so tetrahedral and 1 lp so 107.5
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    (Original post by Weaselmoose)
    total pairs = 4 so tetrahedral and 1 lp so 107.5
    Oh yeah, woops
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    (Original post by David Tennant)
    Hey, you can still get a good grade

    that's a lot of wishful thinking for me
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    (Original post by David Tennant)
    Wats de third thing you get?
    the three are
    but-1-ene
    e-but-2-ene
    z-but-2-ene
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    (Original post by Weaselmoose)
    that's a lot of wishful thinking for me
    Ahhh don't say that ...
    In which of the following reactions is sulfuric(IV) acid, H2SO3, acting as an oxidizing
    agent?
    A 2NaOH + H2SO3 Na2SO3 + 2H2O
    B 2FeCl3 + H2SO3 + H2O 2FeCl2 + H2SO4 + 2HCl
    C 2H2S + H2SO3 3H2O + 3S
    D H2SO3 H2O + SO2
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    (Original post by David Tennant)
    Ahhh don't say that ...
    In which of the following reactions is sulfuric(IV) acid, H2SO3, acting as an oxidizing
    agent?
    A 2NaOH + H2SO3 ������ Na2SO3 + 2H2O
    B 2FeCl3 + H2SO3 + H2O ������ 2FeCl2 + H2SO4 + 2HCl
    C 2H2S + H2SO3 ������ 3H2O + 3S
    D H2SO3 ������ H2O + SO2
    baah A or C?
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    (Original post by Weaselmoose)
    baah A or C?
    C
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    Hello everyone!
    So. How do we learn the differences between reaction of halogens with hot and cold NaOH? ._.
    I'm screwed. Got physics 4 the same day. D:
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    (Original post by Exams v__v)
    Hello everyone!
    So. How do we learn the differences between reaction of halogens with hot and cold NaOH? ._.
    I'm screwed. Got physics 4 the same day. D:
    Are we supposed to memorize these?
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    (Original post by David Tennant)
    Are we supposed to memorize these?
    Yes!
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    (Original post by David Tennant)
    C
    Is there an easy way to work that out or just doing them all individually?
    What are the trends in electronegativity and ionisation energies down grp 2?
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    (Original post by Exams v__v)
    Hello everyone!
    I'm screwed. Got physics 4 the same day. D:
    Hello! Good luck! What board physics are you?
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    (Original post by Weaselmoose)
    Hello! Good luck! What board physics are you?
    Thaaanks, I need lots of it haha!
    Edexcel that too. (:
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    (Original post by Exams v__v)
    Thaaanks, I need lots of it haha!
    Edexcel that too. (:
    Ah, same as us but I dropped physics haha
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    (Original post by Weaselmoose)
    Is there an easy way to work that out or just doing them all individually?
    What are the trends in electronegativity and ionisation energies down grp 2?
    Probably just do it individually. Down the group electronegativity tends to decrease and ionisation energies also decrease.

    Gosh I really hate mechanisms...
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    Yeah I dropped physics too, did well in it but I disliked the teachers
 
 
 
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