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    (Original post by Suits101)
    Spot on.



    Wasn't R Cr(H2O)3(OH)3? If so then yes.



    That's the proper way to do it
    For working out detIa G i got vaIues from the previous questions but used the ones given incase i made any mistakes. It's fine to do this right?
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    (Original post by sztirmzi)
    how many marks was that question worth? 3?
    yeah i think it was 3/4 marks, but youd only drop 1 mark for saying sulpher
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    (Original post by kyfer-19)
    Also, any1 get the equations for Al to show amphoteric?
    using hcl and naoh plz
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    (Original post by palacefloor)
    For working out detIa G i got vaIues from the previous questions but used the ones given incase i made any mistakes. It's fine to do this right?
    Yeah! that's completely alright! don't worry
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    Was charecteristics of cobalt jus general transition netal properties? And how do you explain the ligand sub using thermodynamics
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    (Original post by sztirmzi)
    Yeah! that's completely alright! don't worry
    Thank uuuuu
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    For Q in the chromium chemistry I said NH3 not in excess and the gas produced was NH4+, do you think this could still be right?
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    (Original post by kyfer-19)
    using hcl and naoh plz
    Al2O3 + 6 HCl --> 2 AlCl3 + 3 H20

    Al2O3 + 2 NaOH + 3 H20 --> 2NaAl(OH)4
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    I just remembered that I drew the complex with the ethane-1,2-diamine ligands in pencil. Is that okay :/


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    (Original post by kyfer-19)
    using hcl and naoh plz
    Al203 + 6HCl -> 2AlCl3 + 3H20

    3H2O + Al203 + 2NaOH -> 2NaAl(OH)4
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    Name:  image.jpeg
Views: 251
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    I put phase boundaries at both ends of the representation of a cell like this example in the picture 😭😭 will I lose the marks for that question?
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    (Original post by mojogigi1234)
    Al203 + 6HCl -> 2AlCl3 + 3H20

    3H2O + Al203 + 2NaOH -> 2NaAl(OH)4
    thanks
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    (Original post by EverydayHell)
    For Q in the chromium chemistry I said NH3 not in excess and the gas produced was NH4+, do you think this could still be right?
    NH4+ isnt a gas. They were looking for CO2
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    Does anyone know whether they asked for the shape of the complex?
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    I forgot to draw the cobalt structure! How many marks would that be?
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    (Original post by Jenza)
    I forgot to draw the cobalt structure! How many marks would that be?
    at most 3, likely just 2 marks.
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    (Original post by shiney101)
    Does anyone know whether they asked for the shape of the complex?
    I want to know this too because i forgot to draw the complex!
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    (Original post by DDan123)
    I just remembered that I drew the complex with the ethane-1,2-diamine ligands in pencil. Is that okay :/


    Posted from TSR Mobile
    As long as it was standard HB pencil then yeah
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    (Original post by EverydayHell)
    For Q in the chromium chemistry I said NH3 not in excess and the gas produced was NH4+, do you think this could still be right?
    Nh4+ isn't a gas.
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    Can someone clarify how many marks I would get for using; SO2+ 0.5O2 --> SO3 , in each question involving;
    Enthalpy: My answer was half the correct (0) marks/2
    Entropy: Since using the SO2+ 0.5O2 --> SO3 equation my entropy was also half (0 or 2 ? as follow through of error in eq) marks/2
    Gibbs: My answer was calculated using the half the correct values (follow through based on previous answers)/3


    Am I awarded 3/7 or 5/7 ?
 
 
 
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