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    (Original post by crc290)
    Genuinely don't know. I was just taught [Al(OH)6]3- :dontknow:
    WIki says:

    "Aluminium hydroxide is amphoteric. It dissolves in acid, forming [Al(H2O)6]3+ (hexaaquaaluminium) or its hydrolysis products. It also dissolves in strong alkali, forming [Al(OH)4]- (tetrahydroxidoaluminate)."

    What do I put then? I also thought it was Al(OH)4]-
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    (Original post by manutillidie)
    Isnt it
    Cr07^2- +14h+ +3Zn = 2Cr3+ 3Zn2+ + 7h20
    Whoops yes it is. I was 2H+ short. Thanks!

    Edit: LOL, dunno why I typed 12H+, I have 14H+ written down on paper -_-
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    (Original post by crc290)
    Well yeah, but for this exam the charge is most likely going to be the same
    oh ok. thamks
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    (Original post by Chris-69)
    WIki says:

    "Aluminium hydroxide is amphoteric. It dissolves in acid, forming [Al(H2O)6]3+ (hexaaquaaluminium) or its hydrolysis products. It also dissolves in strong alkali, forming [Al(OH)4]- (tetrahydroxidoaluminate)."

    What do I put then? I also thought it was Al(OH)4]-
    Al(h20)3(0h)3 when OH is dropwise
    Al(OH)4- when in excesss

    I think
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    (Original post by manutillidie)
    Al(h20)3(0h)3 when OH is dropwise
    Al(OH)4- when in excesss

    I think
    Yeah, I mean whether it's [Al(OH)6]3-, which apparently the mark scheme had, or [Al(OH}4]- which I thought it was.
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    (Original post by Chris-69)
    WIki says:

    "Aluminium hydroxide is amphoteric. It dissolves in acid, forming [Al(H2O)6]3+ (hexaaquaaluminium) or its hydrolysis products. It also dissolves in strong alkali, forming [Al(OH)4]- (tetrahydroxidoaluminate)."

    What do I put then? I also thought it was Al(OH)4]-
    The mark scheme allows [Al(H2O)2(OH)4]-, so you might get away with [Al(OH)4]- but I honestly have no idea
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    (Original post by manutillidie)
    Al(h20)3(0h)3 when OH is dropwise
    Al(OH)4- when in excesss

    I think
    it is [Al(OH)4(H20)2]- when in excess
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    (Original post by crc290)
    The mark scheme allows [Al(H2O)2(OH)4]-, so you might get away with [Al(OH)4]- but I honestly have no idea
    Ah I see. Perhaps I'll got for that answer then lol
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    Does anyone have a list of all the equations we need to memorise? Please help, panicking so much!!! Even just a list saying what they are and i will look up myself! thank you solo much !!!
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    Is a bronsted lowry acid a lewis base
    and is a browsted lowry base a lewis acid?


    Posted from TSR Mobile
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    (Original post by hilo36)
    Does anyone have a list of all the equations we need to memorise? Please help, panicking so much!!! Even just a list saying what they are and i will look up myself! thank you solo much !!!
    Here you go, stop panicking and chill!
    http://www.a-levelchemistry.co.uk/AQ...0equations.doc



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    could someone please answer my question on the previous page from cheesypuff thanks PLEASE HELP!!!!!!!!!!!!!!!
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    (Original post by lifeisgood2012)
    Guys for equations.... do we need to add state symbols?
    I would suggest yes, but in most of the questions they do state whether the equations require the state symbols or not
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    (Original post by jadealycia)
    it is [Al(OH)4(H20)2]- when in excess
    [Al(OH)4]-
    [Al(OH)5]2-
    [Al(OH)6]3-

    Are all perfectly acceptable answers when dealing with excess NaOH.
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    (Original post by RoaringLion)
    Is a bronsted lowry acid a lewis base
    and is a browsted lowry base a lewis acid?


    Posted from TSR Mobile
    http://a-levelchemistry.co.uk/AQA%20...ary%20home.htm

    This website has a downlaodable link with nearly ALL equations to learn

    Posted from TSR Mobile
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    (Original post by RoaringLion)
    Is a bronsted lowry acid a lewis base
    and is a browsted lowry base a lewis acid?


    Posted from TSR Mobile
    BL acid is a proton donor
    Lewis base is an electron donor

    In the case of H+ and OH- ions, yes you are right. In the case of [Cr(H2O)6]3+ and ammonia-dropwise (to form NH4+ ions), no. The chromium complex may be a bronsted lowry acid, but is not a lewis base.
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    Good night all! Hope you all get the grades you want tomorrow!
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    (Original post by RoaringLion)
    Here you go, stop panicking and chill!
    http://www.a-levelchemistry.co.uk/AQ...0equations.doc



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    Bloody hell :eek:
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    January 13 mark scheme anyone?
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    (Original post by crc290)
    Genuinely don't know. I was just taught [Al(OH)6]3- :dontknow:
    But that's not what's in the book
 
 
 
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