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    Hey all, for chemistry (OCR A) bond angles and shapes, does anybody know about how to draw the shape of a molecule which has double or triple bonds?

    I know you treat it as a single bond in terms of electron repulsion, but on a actual diagram of the shape and bond angle how is it drawn?

    Ie CO2 is a linear molecule, 180 degree bond angle. How is it drawn?

    O - C - O
    Or
    O = C = O

    And if it is the second way, how do you draw a double or triple bond if the bond is going away from you or towards you, and not in the plane of the paper?

    Thanks in advance








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    (Original post by Hilton184)
    Hey all, for chemistry (OCR A) bond angles and shapes, does anybody know about how to draw the shape of a molecule which has double or triple bonds?

    I know you treat it as a single bond in terms of electron repulsion, but on a actual diagram of the shape and bond angle how is it drawn?

    Ie CO2 is a linear molecule, 180 degree bond angle. How is it drawn?

    O - C - O
    Or
    O = C = O

    And if it is the second way, how do you draw a double or triple bond if the bond is going away from you or towards you, and not in the plane of the paper?

    Thanks in advance








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    You don't draw the double bonds.

    Plane coming towards you = thick triangle, base pointing towards you. Plane coming away is a line. Side planes are -------

    Iirc u cant visually see a multiple bond, but it is worked out
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    (Original post by Obiejess)
    Would mean going to a relatively **** college though...

    And tbh I'd be taking the exact same a level subjects (aside from english) I could do on the IB...

    What's the difference between HL and SL, naturally "harder"

    You can do 4 HLs tbh but it would be a LOT of work. Depends on what you want to do at uni. But I'm really loving the IB and I think it's a BRILLIANT course.

    as my Head of IB says 'A levels are fine if you want a mediocre education'
    (totally not biased...)

    but no seriously it's really good, if you're a capable independent learner, I would do it.

    Posted from TSR Mobile
    HL - more content, more time devoted to it.

    This person was one mark off a 7 in a HL Chemistry paper, he phoned up the university and they said he might as well start the Masters course for Chemistry and skip the Bachelor one. I really like the IB because I can do my Maths and Sciences at HL while also continue doing an awesome language (Latin) and a really interesting humanity (economics).

    (Original post by L'Evil Fish)
    Well then don't... If it's **** though I doubt they'd be running IB.

    HL is higher level, and SL is standard level. HL is like the ones you'd need for uni entrance in terms of grades and subjects. But you need to do well in SL as well to make up for the overall score.

    Like a Cambridge offer may be 42 and 776 at HL
    Actually Cambridge lowered their offer to 40-41 and I'm really happy about that!
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    (Original post by Bude8)
    HL - more content, more time devoted to it.

    This person was one mark off a 7 in a HL Chemistry paper, he phoned up the university and they said he might as well start the Masters course for Chemistry and skip the Bachelor one. I really like the IB because I can do my Maths and Sciences at HL while also continue doing an awesome language (Latin) and a really interesting humanity (economics).



    Actually Cambridge lowered their offer to 40-41 and I'm really happy about that!
    Must be because of the 3 points from ToK and that
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    (Original post by Sycopation)
    Posted from TSR Mobile

    You don't draw the double bonds.

    Plane coming towards you = thick triangle, base pointing towards you. Plane coming away is a line. Side planes are -------

    Iirc u cant visually see a multiple bond, but it is worked out
    This is what my teacher has said but the textbooks all show double bonds as do all the Internet pages I have looked at. For example Name:  ImageUploadedByStudent Room1387751532.843423.jpg
Views: 202
Size:  167.8 KB


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    (Original post by busybumblebee)
    I do Edexcel Maths, Edexcel Chemistry, Edexcel Spanish and Edexcel Biology.

    It is such a jump from GCSE's isn't it!! I actually didn't realise. Everyone kept saying it, but I almost thought that they were exaggerating and I didn't really want to believe them I guess.

    How is everyone finding it?!
    I think it is quite a lot of pressure to be honest.

    I have mocks in January and they have told us to revise over Christmas and I have done some, but it is so difficult trying to revise in the Christmas holidays!!!! Anyone else been told to revise over Christmas and is struggling? Any tips? x
    Hey, yeah i was trying to take in what they were telling us about the big jump and preparing myself and all that, but i still underestimated, chemistry especially! So as for revising, (i've got chem stats and mechanics mocks in jan, and physics and C1 maths didn't exactly go great.), i would recommend u try to adopt the mind frame of 'i love this subject tis the joy of my soul!' and when it all gets too much u could make a cup of tea and stare at it pretending ur thinking, like all the great genii/geniuses did/do if thats even a word. Im finding youtube the most helpful so far i cant really recognise any of my written class notes aha. Especially for maths and chem. I recommend AK Lectures they are great, but apologies if ur not into videos for revision. Good luck.


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    (Original post by L'Evil Fish)
    Must be because of the 3 points from ToK and that
    oh yeah the core, I have a ToK essay to do

    But 776 is still quite damn high cause they're highers (but hey, it's Cambridge), you're on 20 from that, that means you need like 6/6/6 + 2 from SL and the core, which is reasonable though.
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    (Original post by sarcastic-sal)
    It's a 4-night residential thing organised by the EDT (Engineering Development Trust). It's held at various unis and they are all STEM-related courses. You stay over in the halls, go to lectures and have lab sessions depending on which course you go on: basically you get to be an undergrad for a week!
    They try and mimic the ucas process a bit by getting you to apply for up to 5 courses. I'm applying for a mixture of broad-based engineering and chemistry ones
    Ohhh I'm not a fully STEM applicant, just a medic so I won't be thankyou for explaining
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    (Original post by Bude8)
    oh yeah the core, I have a ToK essay to do

    But 776 is still quite damn high cause they're highers (but hey, it's Cambridge), you're on 20 from that, that means you need like 6/6/6 + 2 from SL and the core, which is reasonable though.
    Yeah it's fair enough I think.

    In all honesty, the hardest part of the Cambridge process is getting an interview and passing it. And so getting an offer, grades are the easy bit (unless STEP is involved)
    • Study Helper
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    is there a need to have further maths just to do medicine?
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    (Original post by zed963)
    is there a need to have further maths just to do medicine?
    Definitely not.

    It's probably a worse choice.
    • Study Helper
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    (Original post by L'Evil Fish)
    Definitely not.

    It's probably a worse choice.
    I currently am doing BIology, Chemistry, Physics, maths, further maths and general studies and I'm considering dropping FM so that I can concentrate more on the other 4 and do more work experience related stuff.

    The other thought that is in my mind is that it's better to have 4As rather that 3As and 2Bs etc.
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    (Original post by zed963)
    I currently am doing BIology, Chemistry, Physics, maths, further maths and general studies and I'm considering dropping FM so that I can concentrate more on the other 4 and do more work experience related stuff.

    The other thought that is in my mind is that it's better to have 4As rather that 3As and 2Bs etc.
    Drop f.maths.
    • Study Helper
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    (Original post by L'Evil Fish)
    Drop f.maths.
    What do you recommend I should do after dropping it?

    Spend more time developing my extra curricular?
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    (Original post by zed963)
    What do you recommend I should do after dropping it?

    Spend more time developing my extra curricular?
    Anything :P

    Study, extra curricular, learn a language
    • Study Helper
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    (Original post by L'Evil Fish)
    Anything :P

    Study, extra curricular, learn a language
    I need to learn, russian, mandarin, Spanish, German, Portugese, Latin.
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    (Original post by zed963)
    is there a need to have further maths just to do medicine?
    You are not required to have further math.
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    (Original post by zed963)
    I need to learn, russian, mandarin, Spanish, German, Portugese, Latin.
    Do you speak any?
    • Study Helper
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    (Original post by L'Evil Fish)
    Do you speak any?
    I speak English, Urdu, French, Hindi and bits of punjabi and Arabic.
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    (Original post by zed963)
    I speak English, Urdu, French, Hindi and bits of punjabi and Arabic.
    Fluently?!
 
 
 
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