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    (Original post by GO97)
    like every possible colour? im more than willing to learn every colour on the spec but i dont really have a source to study them, revision guide doesnt give them all and i cant find a useful site. Do you have any recommendations?
    http://www.cram.com/flashcards/trans...olours-6839469
    I made these.
    I haven't written solution or precipitate on all of them and some of them may say precipitate instead of solution. But the one's with charges are solutions and the ones without are precipitates
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    thanks everyone!!
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    (Original post by GO97)
    like every possible colour? im more than willing to learn every colour on the spec but i dont really have a source to study them, revision guide doesnt give them all and i cant find a useful site. Do you have any recommendations?
    Know the 4 precipitation reactions

    Let x be (H2O)6

    Cux pale blue
    Cox pale pink
    Fe2+x pale green
    Fe3+ yellow

    Cu(oh)2 blue
    Cu(oh)2 blue
    Fe(oh)2 green
    Fe(oh)3 orange

    Cucl4 yellow
    Cocl4 blue

    Cu(nh3)4(h2o)2 deep blue

    Kmno4 oxidizing agent is purple and turns. Colour less at end point

    Acidified potass di chrome

    Orange to green
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    (Original post by flylikeafly)
    can someone list down all the cells we need to know
    None.

    Except hydrogen-oxygen fuel cell.

    You need to know that only the feasible reaction occurs in rechargeable (primary) cells and that rechargeable (secondary) cells can be recharged and discharged
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    Al2O3 + H2O ---> ?
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    Can someone explain 7c pls
    http://filestore.aqa.org.uk/subjects...5-QP-JAN13.PDF
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    (Original post by GO97)
    like every possible colour? im more than willing to learn every colour on the spec but i dont really have a source to study them, revision guide doesnt give them all and i cant find a useful site. Do you have any recommendations?
    This is my table I use. Note that the Aluminum column isnt filled in completely. It's mostly white ppt apart from when it's an aqua ion or when it readcts with excess OH where it's colourless solution. Oh and ignore the CO i put in the Fe3+ coloumn for excess nh3:

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    (Original post by badaman)
    Al2O3 + H2O ---> ?
    Does not dissolve in water cus of high strength of Al2O3 lattice.
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    (Original post by Super199)
    Can someone explain 7c pls
    7c what?
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    (Original post by Suits101)
    None.

    Except hydrogen-oxygen fuel cell.

    You need to know that only the feasible reaction occurs in rechargeable (primary) cells and that rechargeable (secondary) cells can be recharged and discharged
    You know when they ask why this cell is not rechargeable or ammeter reading would fall to zero. I don't understand that.
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    (Original post by SirRaza97)
    7c what?
    Check again g
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    Can anyone help me out on this question Name:  image.jpg
Views: 48
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    (Original post by SirRaza97)
    This is my table I use. Note that the Aluminum column isnt filled in completely. It's mostly white ppt apart from when it's an aqua ion or when it readcts with excess OH where it's colourless solution. Oh and ignore the CO i put in the Fe3+ coloumn for excess nh3:

    You don't need every colour spec specifically states fe cu and co in ppt reactions and cu nh3 deep blue cucl4 and cocl4
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    (Original post by Super199)
    Can someone explain 7c pls
    http://filestore.aqa.org.uk/subjects...5-QP-JAN13.PDF
    E Au+(/Au) > E O2(/H2O)
    So H2O reduces Au+ ions to Au so they are not normally found in aqueous solutions.
    Combine Half Equation 1 and 2 (Times 1st one by 2) to get:
    2Au+ + H2O → 2Au + 1/2O2 + 2H+
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    Getting hella nervous now :/// I feel like I know everything but I feel like I'm just going to blank in the exam
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    Anyone able to explain January 2011 2b)
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    (Original post by badaman)
    E Au+(/Au) > E O2(/H2O)
    So H2O reduces Au+ ions to Au so they are not normally found in aqueous solutions.
    Combine Half Equation 1 and 2 (Times 1st one by 2) to get:
    2Au+ + H2O → 2Au + 1/2O2 + 2H+
    I dont get the E cell greater than the other one stuff

    Same with 7c.
    Do you mind explaining
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    (Original post by Windowswind123)
    http://www.cram.com/flashcards/trans...olours-6839469
    I made these.
    I haven't written solution or precipitate on all of them and some of them may say precipitate instead of solution. But the one's with charges are solutions and the ones without are precipitates
    thnx! ive memorized most of these just some odd balls like the chloride complexes. also it says on the quiz that fe(h20)6^3+ is pale violet but i swear its yellow? or am i reading it wrong?
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    (Original post by YoloSwagginz)
    Know the 4 precipitation reactions

    Let x be (H2O)6

    Cux pale blue
    Cox pale pink
    Fe2+x pale green
    Fe3+ yellow

    Cu(oh)2 blue
    Cu(oh)2 blue
    Fe(oh)2 green
    Fe(oh)3 orange

    Cucl4 yellow
    Cocl4 blue

    Cu(nh3)4(h2o)2 deep blue

    Kmno4 oxidizing agent is purple and turns. Colour less at end point

    Acidified potass di chrome

    Orange to green
    Nice, Thanks!
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    (Original post by GO97)
    thnx! ive memorized most of these just some odd balls like the chloride complexes. also it says on the quiz that fe(h20)6^3+ is pale violet but i swear its yellow? or am i reading it wrong?
    Its yellow
 
 
 
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