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    (Original post by MathsNerd1)
    Just a warning, at 9 I'll do some unit 1 stuff again.

    Entropy is the quantitative measure of the degree if disorder in a system.


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    Oh no

    correct! my turn
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    (Original post by otrivine)
    Oh no

    correct! my turn
    It's fine cause if we do this at least 2 hours a day thing and just keep alternating then that'll be some great revision for me, but unit 1 is first so I need to focus more on that right now

    Okay:
    Explain the properties of transition metal compounds (4)
    Also define a transition element (1)

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    (Original post by MathsNerd1)
    It's fine cause if we do this at least 2 hours a day thing and just keep alternating then that'll be some great revision for me, but unit 1 is first so I need to focus more on that right now

    Okay:
    Explain the properties of transition metal compounds (4)
    Also define a transition element (1)

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    sure!

    1) catalysts, coloured compounds, variable oxidation states and are metals which are hard. Have partially filled d sub shells

    2) one or more ion with a partially filled d sub shell
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    (Original post by otrivine)
    sure!

    1) catalysts, coloured compounds, variable oxidation states and are metals which are hard. Have partially filled d sub shells

    2) one or more ion with a partially filled d sub shell
    Correct!


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    (Original post by MathsNerd1)
    Correct!


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    Give the half equations and full balanced equation (overall) when titrating between mangangate and when Fe3+ is reduced to Fe2+ (4)
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    (Original post by otrivine)
    Give the half equations and full balanced equation (overall) when titrating between mangangate and when Fe3+ is reduced to Fe2+ (4)
    It'll be easier posting the picture instead of writing it all out.


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    (Original post by MathsNerd1)
    It'll be easier posting the picture instead of writing it all out.


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    Perfect!!

    my turn
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    (Original post by otrivine)
    Perfect!!

    my turn
    Okay, 1 more each then I'm onto the other unit. Here's yours

    Question 7 if it wasn't already obvious


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    (Original post by MathsNerd1)
    Okay, 1 more each then I'm onto the other unit. Here's yours

    Question 7 if it wasn't already obvious


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    that took quite long!

    ok

    1) 8H+ + MNO4- + 5e- --> Mn2+ + 4h2o

    2) 6H+ + 5(COOH)2 + 2MNO4 - ---> 10CO2 +2Mn2+ + 8H20

    3) concentration = 0.03 mol dm-3
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    (Original post by otrivine)
    that took quite long!

    ok

    1) 8H+ + MNO4- + 5e- --> Mn2+ + 4h2o

    2) 6H+ + 5(COOH)2 + 2MNO4 - ---> 10CO2 +2Mn2+ + 8H20

    3) concentration = 0.03 mol dm-3
    That's all correct! Last one for me now


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    (Original post by MathsNerd1)
    That's all correct! Last one for me now


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    ok

    For each of the unbalanced redox equations below:

    a) MnO4- + U3+ → Mn2+ + UO2+ in aqueous acid (H+ present) conditions
    b) Cr2O72- + C2O42- → CO2 + Cr3+ in aqueous acid (H+ present) solutions

    (i) Identify which species is the oxidizing agent and which is the reducing agent.

    (ii) Write the balanced half-equations for the oxidation half reaction and the reduction half reaction

    (iii) Balance the redox equation
    (12 marks)
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    (Original post by otrivine)
    ok

    For each of the unbalanced redox equations below:

    a)MnO4- + U3+ → Mn2+ + UO2+ in aqueous acid (H+ present) conditions
    b)Cr2O72- + C2O42- → CO2 + Cr3+ in aqueous acid (H+ present) solutions

    (i) Identify which species is the oxidizing agent and which is the reducing agent.

    (ii) Write the balanced half-equations for the oxidation half reaction and the reduction half reaction

    (iii) Balance the redox equation
    (12 marks)
    Oh how kind are you! This might take a while and I'm still eating to I could be some time, just check back again in about 30 minutes


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    (Original post by MathsNerd1)
    Oh how kind are you! This might take a while and I'm still eating to I could be some time, just check back again in about 30 minutes


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    hahahaha , thank you, I am an examiner
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    (Original post by otrivine)
    ok

    For each of the unbalanced redox equations below:

    a)MnO4- + U3+ → Mn2+ + UO2+ in aqueous acid (H+ present) conditions
    b)Cr2O72- + C2O42- → CO2 + Cr3+ in aqueous acid (H+ present) solutions

    (i) Identify which species is the oxidizing agent and which is the reducing agent.

    (ii) Write the balanced half-equations for the oxidation half reaction and the reduction half reaction

    (iii) Balance the redox equation
    (12 marks)
    Okay I think this is correct for the first one. I'm getting slightly stuck on the half equation part of the second one though :-/




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    (Original post by otrivine)
    hahahaha , thank you, I am an examiner
    What do I do next as I don't see how I can remove the second carbon molecule :-/


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    (Original post by MathsNerd1)
    What do I do next as I don't see how I can remove the second carbon molecule :-/


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    Okay , tomorrow I will send an attachment with the correct solutions

    yup you are correct by the way regarding the first equationm
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    (Original post by otrivine)
    Okay , tomorrow I will send an attachment with the correct solutions

    yup you are correct by the way regarding the first equationm
    Okay, thanks and I'm glad I at least got the first one correct, I also apologise about my handwriting as I assume you struggled reading it? Most people tend to And I'm now determined to work this thing out! Forget unit 1 now, I'm completing this first.


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    (Original post by MathsNerd1)
    Okay, thanks and I'm glad I at least got the first one correct, I also apologise about my handwriting as I assume you struggled reading it? Most people tend to And I'm now determined to work this thing out! Forget unit 1 now, I'm completing this first.


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    hahaha no worries!

    do it then ill mark
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    (Original post by otrivine)
    hahaha no worries!

    do it then ill mark
    Hmm, do you have a list of redox equations like this to help give me some more practice to be able to build up to this? I'm confused how a carbon molecule can be removed, can methane be produced by it or isn't that possible?


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    (Original post by MathsNerd1)
    Hmm, do you have a list of redox equations like this to help give me some more practice to be able to build up to this? I'm confused how a carbon molecule can be removed, can methane be produced by it or isn't that possible?


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    Not really, ok I will do a lot of examples for you!
 
 
 
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