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    (Original post by thad33)
    That and pick a topic and find harder material beyond the specification from a different source


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    Yeah that's what I do.
    Have people memorised the electron configurations for the ions of Sc and Zn, or do you just go with it, knowing Sc3+ and Zn2+ are the only ions that form?
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    (Original post by Serine Soul)
    Yeah that's what I do.
    Have people memorised the electron configurations for the ions of Sc and Zn, or do you just go with it, knowing Sc3+ and Zn2+ are the only ions that form?
    I just know it.
    These transition metal colours are driving me crazy
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    (Original post by supercrazyxo)
    I just know it.
    These transition metal colours are driving me crazy
    Wow I just typed a comprehensive list with all the colours we need to know, subscripts and superscripts and everything

    All gone becase I opened a new tab to check before posting

    Piss off TSR
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    (Original post by Serine Soul)
    Wow I just typed a comprehensive list with all the colours we need to know, subscripts and superscripts and everything

    All gone becase I opened a new tab to check before posting

    Piss off TSR
    LOOOOOOOOOOL FeelsBadMan
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    (Original post by supercrazyxo)
    LOOOOOOOOOOL FeelsBadMan
    On mobile too ;_; all that effort
    I might try again, with colours haha
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    With electrophilic substitution, with the intermediate why does the nitrobenzene or halobenzene form instead of reforming benzene??


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    (Original post by Saywhatyoumean)
    With electrophilic substitution, with the intermediate why does the nitrobenzene or halobenzene form instead of reforming benzene??


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    It's how the universe works.

    If I had to guess, it would be because the substituted group and the benzene ring have a greater attraction for the electrons than the hydrogen atom does. Hydrogen atoms have a much lower electronegativity than something like chlorine atoms, which explains the polarity of HCl and hydrogen bonding etc.
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    (Original post by Serine Soul)
    Yeah that's what I do.
    Have people memorised the electron configurations for the ions of Sc and Zn, or do you just go with it, knowing Sc3+ and Zn2+ are the only ions that form?
    What do you mean? I just work out each one systematically


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    (Original post by Saywhatyoumean)
    With electrophilic substitution, with the intermediate why does the nitrobenzene or halobenzene form instead of reforming benzene??


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    http://web.usm.my/chem/LECTURER/KOT2...22_Chap_17.pdf
    Slide 5


    http://chemwiki.ucdavis.edu/Core/Org...c_Substitution
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    (Original post by thad33)
    What do you mean? I just work out each one systematically


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    That's what I mean
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    Could anyone explain the formation of H2 gas? I don't understand the MS answer
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    (Original post by AqsaMx)
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    Could anyone explain the formation of H2 gas? I don't understand the MS answer
    OH- ----> H2

    OH- ----> O2

    How can you fill in the gaps?
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    In my book in the ligand substitution section:

    [Cu(H2O)6]2+ + 4HCl ----> [CuCl4]2- + 6H2O

    But the atoms don't balance??
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    (Original post by Hunnybeebee)
    In my book in the ligand substitution section:

    [Cu(H2O)6]2+ + 4HCl ----> [CuCl4]2- + 6H2O

    But the atoms don't balance??
    Not + 4HCl, but 4Cl-
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    (Original post by rory58824)
    Not + 4HCl, but 4Cl-
    ah thank you! So you're adding HCl, but write it as Cl- ions in the equation? thank you
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    (Original post by Hunnybeebee)
    ah thank you! So you're adding HCl, but write it as Cl- ions in the equation? thank you
    You can write out an equation with HCl:

    [Cu(H2O)6]2+ + 4HCl ----> [CuCl4]2- + 6H2O + 4H+ (I think this is correct, someone please correct me if not)
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    (Original post by AqsaMx)
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    Could anyone explain the formation of H2 gas? I don't understand the MS answer
    Here
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    (Original post by TeachChemistry)
    Here
    Thank you
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    (Original post by Serine Soul)
    OH- ----> H2

    OH- ----> O2

    How can you fill in the gaps?
    That's how I was trying to work it out but I was confused as to why the OH- and H2 were on the same side but I get it now
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    Attachment 541063541065

    Can anyone explain this step by step? And why you divide the enthalpy change by the energy taken up??
    Thank you
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