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Edexcel A2 Chemistry Exams -6CH04 (14th June) and 6CH05 (22nd June) Discussion Thread Watch

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    (Original post by Footyrulez)
    Ah thats what I got as well!!
    Noooo was there a second. Reaction fml


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    (Original post by nicklongy)
    What did people get for the MCQ about amphoteric behaviour? Is it Zn(OH)2 beacuse thats the only one that can redissolve thus losing more protons?

    Also what did people put as the catalyst for 2Ce4+ + Tl+ = 2Ce3+ = Tl3+
    Yes and Fe2+ catalyst
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    (Original post by GrandMasti)
    I got 6 isomers for the MCQ about the di nitro methyl benzene
    same
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    (Original post by Supermanxxxxxx)
    Noooo was there a second. Reaction fml


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    second reaction gave you a negative Ecell though??
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    Did people get the polychromic glasses question?
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    (Original post by GrandMasti)
    I got 6 isomers for the MCQ about the di nitro methyl benzene
    same
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    (Original post by Funky_Giraffe)
    Yes and Fe2+ catalyst
    do you mean fe 3+ , ii dont think fe 2+ was an option was it?
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    (Original post by Footyrulez)
    second reaction gave you a negative Ecell though??
    I didn't even know there was a second reaction though I only wrote about the +0.46 one


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    (Original post by nicklongy)
    What did people get for the MCQ about amphoteric behaviour? Is it Zn(OH)2 beacuse thats the only one that can redissolve thus losing more protons?

    Also what did people put as the catalyst for 2Ce4+ + Tl+ = 2Ce3+ = Tl3+
    Fe3+
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    (Original post by Funky_Giraffe)
    Did people get the polychromic glasses question?
    I think they gave a clue with the disproportionation stuff
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    (Original post by lfcrules)
    do you mean fe 3+ , ii dont think fe 2+ was an option was it?
    Yes sorry! Fe3+
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    (Original post by Funky_Giraffe)
    Did people get the polychromic glasses question?
    Oh yh lmao , remember seeing that last night in the george fcer textbook

    cucl + agcl = cucl2 and Ag
    Solid silver is formed so the glasses darken
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    (Original post by Franckenstar)
    I think they gave a clue with the disproportionation stuff
    Ah ok. But it wasn't a disproportionation for the previous question, was it?
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    There were 3 steps in the sythesis of benzamide right? Oxidation by K2Cr2O7, then PCl5, then Ammonia to form the amide?
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    (Original post by Funky_Giraffe)
    Did people get the polychromic glasses question?
    Energy from photons oxidises Cu+ to Cu2+, electron released reduces Ag+ to Ag solid, Ag solid causes sunglasses to darken
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    (Original post by Franckenstar)
    Yeah they have to be seprerated from the chiral stuff
    I just said that racemic mixture could be formed with other optical isomer which could have harmful effects. To solve this find a process which is stereospecific.
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    (Original post by Funky_Giraffe)
    Ah ok. But it wasn't a disproportionation for the previous question, was it?
    No just the definition. For the polychromic I talked about the formation of Ag solid
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    (Original post by GrandMasti)
    There were 3 steps in the sythesis of benzamide right? Oxidation by K2Cr2O7, then PCl5, then Ammonia to form the amide?
    yep did the same thing
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    (Original post by GrandMasti)
    Fe3+
    It was Zn(OH)2 wasn't it? That's amphoteric
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    (Original post by DesignPredator)
    I just said that racemic mixture could be formed with other optical isomer which could have harmful effects. To solve this find a process which is stereospecific.
    did anyone speak about chiral auxillaries to direct groups in specific positions?
 
 
 
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