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Edexcel - Chemistry Unit 2 - 4 June 2013 Watch

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    I reckon its up on the edexcel website as "practical work mapping".
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    can someone please post some revision notes for green chemistry and the mechanism....i really don't get them:confused:.....your help would be much appreciated
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    (Original post by khush1995)
    can someone please post some revision notes for green chemistry and the mechanism....i really don't get them:confused:.....your help would be much appreciated
    What mechanism are you referring to? The one with free radicals and the ozone layer?
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    Do we really need to know the ozone mechanisms? Or do we just need to know how to balance?
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    My teacher suggested beginning with section B or C and ending with A, as if you run out of time you can guess section A but you can't guess section C. What do you all think?
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    Does anyone know how to study the thermal decomposition of group 1 and 2 nitrates? Do you heat up the metal nitrate, look for brown gas and stick and glowing splint in the test tube and it relights?
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    (Original post by TheKingOfTSR)
    Do we really need to know the ozone mechanisms? Or do we just need to know how to balance?
    You really should know the mechanism. It's the same for chlorine free radicals and nitrogen monoxide free radicals.

    (Original post by Lgambo)
    My teacher suggested beginning with section B or C and ending with A, as if you run out of time you can guess section A but you can't guess section C. What do you all think?
    You can't 'guess' section A, it's an objective test of your knowledge on a wide range of subjects. Personally, I would recommend just working through the paper, start to finish and skipping things if you get flustered.

    (Original post by Locked_box)
    Does anyone know how to study the thermal decomposition of group 1 and 2 nitrates? Do you heat up the metal nitrate, look for brown gas and stick and glowing splint in the test tube and it relights?
    Yah - there are some other examples in the CGP revision guide if you have that?
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    Can somebody help me with calculations that is where I always loose marks
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    (Original post by wbrian)
    Can somebody help me with calculations that is where I always loose marks
    Can you be a little more specific please? Any particular calculations you're stuck with?
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    guys for group 2 chem
    why cant Be react with water?
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    (Original post by Priya08)
    guys for group 2 chem
    why cant Be react with water?
    Has an inert BeO layer (kind of like Aluminium)
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    (Original post by Priya08)
    guys for group 2 chem
    why cant Be react with water?
    Well Beryllium doesn't react with water and there is just a thick oxide layer, laying on top of the surface of Be. The reactivity increases down the group.
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    For the flame test for Calcium, is the colour, yellow-red, brick red or just plain o' red?
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    [QUOTE=HarryMWilliams;


    Yah - there are some other examples in the CGP revision guide if you have that?[/QUOTE]


    I don't have the CGP revision guide but they way I mentioned before, is that alright?
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    (Original post by Jayqwe)
    For the flame test for Calcium, is the colour, yellow-red, brick red or just plain o' red?
    Use "Brick-Red" to be safe.
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    I am such an idiot I have 3 exams next week and I am not ready for any of them, wasted my time chatting to gals but I will try to cover Unit 2 Chemistry today and tomorrow wish me luck. I just need to focus really hard from now on.
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    (Original post by Baraf)
    I am such an idiot I have 3 exams next week and I am not ready for any of them, wasted my time chatting to gals but I will try to cover Unit 2 Chemistry today and tomorrow wish me luck. I just need to focus really hard from now on.
    We're here if you need encouragement for 6CH02. Go chemistry!
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    (Original post by Mollymod)
    ""

    How did you find it?
    ah it's okay, same here I don't quite know how to feel about leaving Sixth form though At least now I don't need to call into school explaining how ill I am (so I can revise at home)

    Good luck with Biology & German I am doing nothing but unit 2/unit 4 chemistry for the next week !

    For unit 1 I think it was the worst chemistry exam I've sat yet I was expecting questions like "what is an alkane" ... and I would gain easy UMS I screwed up the reason for sodium carbonate use in cooking too believe it or not (do people use it to remove acid from their food?)... I realized afterwards it's the same thing as bicarbonate of soda Hess's law question - was unable to extract much information from their text... couldn't understand the question. The Question with Arsenic & Selenium confused me too as well as drawing cracking apparatus

    Oh well I must look forward to unit 2,4 & 5 now I quite literally need 84 UMS across all 3 of these exams.. to get my B ! This is proving so much more difficult than Physics & Maths where I need an A, and thanks to chemistry I have far less time for those 2

    & I think you'll be the boss at unit 5, hehe... best of luck with revision
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    (Original post by posthumus)
    x
    A friend of mine took the Unit 1 exam and found it quite hard. I had a look later and it seemed like one big attempt to be "different" by Edexcel.

    When you say you need 84 UMS, is that in each exam? If so, I'm in the same position as you.
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    (Original post by HarryMWilliams)
    A friend of mine took the Unit 1 exam and found it quite hard. I had a look later and it seemed like one big attempt to be "different" by Edexcel.

    When you say you need 84 UMS, is that in each exam? If so, I'm in the same position as you.
    Hopefully the grade boundaries will be quite low then I work so bloody hard towards chemistry exams and I've walked out of every single one in complete misery I got well below 50 out of 80 last year in Jan... the only reason I got 88 UMS was due to the ridiculously low grade boundaries

    Yup Basically I haven't made it any "easier" to get my B overall with my other exam, which is a shame really Are you sitting Unit 4 as well as 2 & 5? If you don't mind myself asking
 
 
 
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