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OCR B (Salters) F332 Tuesday 4th June 2013 Exam Discussion (Now Closed) watch

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    (Original post by krisshP)
    I hated it. I don't understand what the answer really is for that question. Anyone know?
    Into Atmosphere;
    From soil and oceans (aquatic and soil systems)

    Equation:
    N2O --> N2 + O

    How it disappears;
    By that reaction which is photolysis (QWC)
    The radical can then react with N2O to produce N2 + O2
    It can also go back into the ocean
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    (Original post by imym)
    Og god. Should not have read through this, thought the exam went well until I realised all the questions I managed to get wrong.
    hmmm me too /: everyone seems to have done really well, so grade boundaries gunna be high ....
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    (Original post by abzy1234)
    Yah! But I still don't get how F335 has the lower weighting than F332. Salters is messed up
    I'm very surprised you realised this now
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    (Original post by abzy1234)
    I also put increase. But I struggled on that, crossed out increases, then wrote decreases, then wrote no change, and finally agreed on increase lol!

    I would imagine that it would increase it as well, as increasing the temperature should have an equal impact on both the forward and backward reaction...
    (Original post by steviep14)
    I put decrease, increase
    Same for the rate question
    and yes..
    Awesome! looks like we all agree :P Good good..what else was there :/

    Oh shape of N2O is linear? 2 regions of electron density?
    Oxidation state was -3, became +3, increases in ox state= oxidation...

    I didn't get the isomer at all, haha drew some random shiz
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    Wasn't the alcohol question tertiary?


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    (Original post by MintCrepz)
    Could we have had Nitrogen (III) dioxide ? How were we meant to know it was nitrite lmao. And nitrate is NO3
    thats exactly why i didnt put nitrate i put nitrogen dioxide but i thinks thats not right:confused:
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    (Original post by tigerz)
    Awesome! looks like we all agree :P Good good..what else was there :/

    Oh shape of N2O is linear? 2 regions of electron density?
    Oxidation state was -3, became +3, increases in ox state= oxidation...

    I didn't get the isomer at all, haha drew some random shiz
    I said it was linear! And th same for the oxidation states.


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    (Original post by Whostolemycookie)
    I HATED the exam!!!!
    I feel like so bad
    But and least it's holidays
    I'm dropping chemistry due to salters Ocr being awful

    I flat quite happy to end this messed up spec after the exam
    :yay:
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    (Original post by anthonyrf)
    I said it was linear! And th same for the oxidation states.


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    Awesome, yeah the alcohol was tertiary

    Totally messed up the naming :lol:
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    (Original post by King Hotpie)
    I'm pretty sure it is, that's what it says on wikipedia. You're just showing off
    That is like the one thing i got right, i promise
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    What did people get for th question asking about the volume of Cl2 where it gave you the mass of NaCl? I got like 41...


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    if you put photodissociation instead of photolysis would you still get the mark?
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    (Original post by anthonyrf)
    I said it was linear! And th same for the oxidation states.


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    Hate to break this to you, but I think it was bent because of the two lone pairs of electrons on the oxygen
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    (Original post by anthonyrf)
    What did people get for th question asking about the volume of Cl2 where it gave you the mass of NaCl? I got like 41...


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    around 40000dm^3
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    (Original post by anthonyrf)
    What did people get for th question asking about the volume of Cl2 where it gave you the mass of NaCl? I got like 41...


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    41025.6dm^3?
    anything better than 41000 will be 3 marks
    I went overkill with the 1dp though
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    (Original post by steviep14)
    41025.6dm^3?
    anything better than 41000 will be 3 marks
    I went overkill with the 1dp though
    I did the exact same thing! LOL They didn't ask for sig figs so I wen't all crazy :lol:
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    (Original post by booooomblastruin)
    Hate to break this to you, but I think it was bent because of the two lone pairs of electrons on the oxygen
    No, as the nitrogen is the central atom
    therefore, it is the number of regions of electron density on this atom which determines bond angle

    There were "4 bonds" but 2 regions of electron density...
    So 180 degrees / linear as electron pairs repel as far as possible
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    (Original post by booooomblastruin)
    Hate to break this to you, but I think it was bent because of the two lone pairs of electrons on the oxygen
    but wasn't it talking about the central nitrogen atom?
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    What about the atom economy question?
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    (Original post by Waki)
    What about the atom economy question?
    i did 71/ the mr of the reactants then multiplied by 100
 
 
 
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