Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    1
    ReputationRep:
    why is tetrachloromethane deflected more by a charged rod than ethanal?
    Offline

    0
    ReputationRep:
    Tetrachloromethane is a non polar molecule (even though the C-Cl bond is polar). This is because the molecule is symmetrical, so the polarities cancel out.
    Ethanal, however, IS polar because it's not symmetrical and has a polar bond ( C=O ).

    Polar molecules are deflected, non polar molecules are not. Therefore the CCl4 is deflected LESS.
    • Thread Starter
    Offline

    1
    ReputationRep:
    (Original post by Murrica)
    Tetrachloromethane is a non polar molecule (even though the C-Cl bond is polar). This is because the molecule is symmetrical, so the polarities cancel out.
    Ethanal, however, IS polar because it's not symmetrical and has a polar bond ( C=O ).

    Polar molecules are deflected, non polar molecules are not. Therefore the CCl4 is deflected LESS.
    Thank you

    do you do AS Chemistry?
    Offline

    0
    ReputationRep:
    (Original post by upthegunners)
    Thank you

    do you do AS Chemistry?
    No problem And I'm in A2 now
    • Thread Starter
    Offline

    1
    ReputationRep:
    (Original post by Murrica)
    No problem And I'm in A2 now
    sweet I am finding edexcel chemistry really hard
    I got an A* at GCSE and I worked really hard this year but just cant get good grades in Chemistry I am fine with my other subjects (bio, physics maths) but chemistry is just soooo hard

    any tips? I really really would love an A but I am starting to believe I just dont have the ability
    Offline

    0
    ReputationRep:
    (Original post by upthegunners)
    sweet I am finding edexcel chemistry really hard
    I got an A* at GCSE and I worked really hard this year but just cant get good grades in Chemistry I am fine with my other subjects (bio, physics maths) but chemistry is just soooo hard

    any tips? I really really would love an A but I am starting to believe I just dont have the ability
    I do edexcel chemistry, too! And like you, I got A* at GCSE. Whenever I didn't do so well in class, I'd always get really thrown off and upset about it.

    Surprisingly though, I came out with a really good grade last year (and this year), despite barely ever getting anything the first time round!

    One way to revise chemistry that I would highly recommend is to make question/answer notes. It's real tedious but well worth it in the end! What you do is you go through each relevant chapter, and instead of copying stuff down you just rephrase it into questions. you can fold each piece of paper in half (lengthwise) and write questions on one side, and answers on the other :P

    Alternatively, I'd suggest past papers - after you get a few down, you get a really good idea of what they're looking for! :rolleyes:
    • Thread Starter
    Offline

    1
    ReputationRep:
    (Original post by Murrica)
    I do edexcel chemistry, too! And like you, I got A* at GCSE. Whenever I didn't do so well in class, I'd always get really thrown off and upset about it.

    Surprisingly though, I came out with a really good grade last year (and this year), despite barely ever getting anything the first time round!

    One way to revise chemistry that I would highly recommend is to make question/answer notes. It's real tedious but well worth it in the end! What you do is you go through each relevant chapter, and instead of copying stuff down you just rephrase it into questions. you can fold each piece of paper in half (lengthwise) and write questions on one side, and answers on the other :P

    Alternatively, I'd suggest past papers - after you get a few down, you get a really good idea of what they're looking for! :rolleyes:
    Thank you, that's excellent advice I have done about 2/3 past papers and I still find it so hard. I find there's so many reactions to remember.. I am hoping it all 'clicks' and clicks soon :L I have the exam on the 4th of june
    Offline

    0
    ReputationRep:
    (Original post by upthegunners)
    Thank you, that's excellent advice I have done about 2/3 past papers and I still find it so hard. I find there's so many reactions to remember.. I am hoping it all 'clicks' and clicks soon :L I have the exam on the 4th of june
    No worries, feel free to message me if you need any more help! and there really is, but if you manage to make sense of them you should be O.K.! Just make sure you don't forget it all for A2 :P
    • Thread Starter
    Offline

    1
    ReputationRep:
    (Original post by Murrica)
    No worries, feel free to message me if you need any more help! and there really is, but if you manage to make sense of them you should be O.K.! Just make sure you don't forget it all for A2 :P
    thanks very much for your help

    In Unit 2 you have to apply your knowledge so much more
    Offline

    0
    ReputationRep:
    (Original post by upthegunners)
    thanks very much for your help

    In Unit 2 you have to apply your knowledge so much more
    Wait till you get to unit 5, muhahaha :devil:
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Brussels sprouts
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Quick reply
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.