National 5 Chemistry

Announcements Posted on
Four things that unis think matter more than league tables 08-12-2016
    Offline

    2
    ReputationRep:
    There was a question where you had to draw the structural formula when you were give the shortened structural formula and I got confused because the end carbon atoms only had three bonds so did any one add double bonds in??


    Posted from TSR Mobile
    Offline

    2
    ReputationRep:
    (Original post by Abbyy1234)
    There was a question where you had to draw the structural formula when you were give the shortened structural formula and I got confused because the end carbon atoms only had three bonds so did any one add double bonds in??


    Posted from TSR Mobile
    Take a pic of what you drew and post it here if u can remember.
    Offline

    3
    ReputationRep:
    (Original post by Abbyy1234)
    There was a question where you had to draw the structural formula when you were give the shortened structural formula and I got confused because the end carbon atoms only had three bonds so did any one add double bonds in??


    Posted from TSR Mobile
    That question threw me for a loop. I put double bonds in but honestly I hadn't a clue what I was doing.
    Offline

    1
    ReputationRep:
    Did anyone else think that this paper was quite different this year? Loads of problem solving and there questions that I was 100% sure would come up didn't, like graphs, etc.
    Offline

    0
    ReputationRep:
    (Original post by lornc)
    Did anyone else think that this paper was quite different this year? Loads of problem solving and there questions that I was 100% sure would come up didn't, like graphs, etc.
    Yeah, I feel like I'm in the minority of people who actually struggled with quite a lot of this years paper haha


    Posted from TSR Mobile
    Offline

    3
    ReputationRep:
    (Original post by lornc)
    Did anyone else think that this paper was quite different this year? Loads of problem solving and there questions that I was 100% sure would come up didn't, like graphs, etc.
    I expected it to be different bc the papers change but there was quite a lot of problem solving (not my strong point lol). I'm sure it was a fair paper but just some weak points for me.
    Offline

    0
    ReputationRep:
    (Original post by Abbyy1234)
    There was a question where you had to draw the structural formula when you were give the shortened structural formula and I got confused because the end carbon atoms only had three bonds s7o did any one add double bonds in??


    Posted from TSR Mobile
    Yeah cause I was always told carbon must have 4 bonds
    (Original post by Abbyy1234)
    There was a question where you had to draw the structural formula when you were give the shortened structural formula and I got confused because the end carbon atoms only had three bonds so did any one add double bonds in??


    Posted from TSR Mobile
    Offline

    0
    ReputationRep:
    In the question where you had to use the specific heat capacity to calculate the temperature increas what did you get? I got 55, and the other two people in my school in the exam got 18 and 0.4. So yeah I'm really worried I've completely messed that one up.
    Offline

    2
    ReputationRep:
    (Original post by Abbyy1234)
    There was a question where you had to draw the structural formula when you were give the shortened structural formula and I got confused because the end carbon atoms only had three bonds so did any one add double bonds in??


    Posted from TSR Mobile
    OMG Abbyy, someone thinks the same way I did, I didn't doa double bond but it was very unusual for carbon not to have 4 bonds... It should have said anyway if it was a double bond in the structural formula. Are we supposed to assume its a double bond ? I was always taught to show a double bond in a structural formula. I didn't add a double bond because I thought maybe it was a rule breaker that you would learn about.
    Offline

    1
    ReputationRep:
    hey guys you have to add the double bond in for this question. this is because when you get the molecular formula you should be able to find the general formula by counting the number of the atoms in the molecules. (No.of Carbon atoms etc.) once you find this general formula you should be able to find what family of hydrocarbon that it belongs too. (Alkene or Alkane). This will then help you decide whether you should put in the double bond or not. Hope this helps
    Offline

    0
    ReputationRep:
    (Original post by Emmaj2000)
    In the question where you had to use the specific heat capacity to calculate the temperature increas what did you get? I got 55, and the other two people in my school in the exam got 18 and 0.4. So yeah I'm really worried I've completely messed that one up.
    I got 55 as well and I know quite a lot of others at my school who got that too!😊


    Posted from TSR Mobile
    Offline

    0
    ReputationRep:
    (Original post by M3g4nxx)
    What did people put for the question about another reason why ammonia is a good fertiliser?


    Posted from TSR Mobile
    I put that it could be converted into nitrogen by nitrifying bacteria that is required for plant growth but I have no idea if thats right sorry
    Offline

    2
    ReputationRep:
    (Original post by Jay431)
    For what question? The one that went like:

    "What can sodium be described as" Something like that?
    Yea. Was that insulator? The ion bridge thing


    Posted from TSR Mobile
    Offline

    2
    ReputationRep:
    (Original post by Ethan100)
    OMG Abbyy, someone thinks the same way I did, I didn't doa double bond but it was very unusual for carbon not to have 4 bonds... It should have said anyway if it was a double bond in the structural formula
    Yeah that's what I thought so it would've have been like CH2=CH(CH3) etc


    Posted from TSR Mobile
    Offline

    3
    ReputationRep:
    (Original post by Emmaj2000)
    In the question where you had to use the specific heat capacity to calculate the temperature increas what did you get? I got 55, and the other two people in my school in the exam got 18 and 0.4. So yeah I'm really worried I've completely messed that one up.
    I got 55 as well and my friend did too. Another friend got a different answer but I've seen a few people on here with 55 so maybe we're right or maybe we're wrong haha
    Offline

    1
    ReputationRep:
    i think 55 is correct as it sounds like the correct number. I also got 55 as well.
    Offline

    2
    ReputationRep:
    Wow my typing is atrocious


    Posted from TSR Mobile
    Offline

    2
    ReputationRep:
    (Original post by M3g4nxx)
    For what question?


    Posted from TSR Mobile
    The sodium ion bridge one


    Posted from TSR Mobile
    Offline

    2
    ReputationRep:
    (Original post by lornc)
    Did anyone else think that this paper was quite different this year? Loads of problem solving and there questions that I was 100% sure would come up didn't, like graphs, etc.
    Yes. It was very different. Different in a good and bad way. There were some hard questions and some not so bad, But there was a lot of new questions.


    (Original post by Ethan100)
    OMG Abbyy, someone thinks the same way I did, I didn't doa double bond but it was very unusual for carbon not to have 4 bonds... It should have said anyway if it was a double bond in the structural formula. Are we supposed to assume its a double bond ? I was always taught to show a double bond in a structural formula. I didn't add a double bond because I thought maybe it was a rule breaker that you would learn about.
    I didn't do a double bond either, But I was a bit wary about it. Think Abby has done it right.
    Offline

    0
    ReputationRep:
    (Original post by M3g4nxx)
    I got 55 as well and I know quite a lot of others at my school who got that too!😊


    Posted from TSR Mobile
    Thank you! That has slightly settled and my nerves 😂 and best of luck for the 9th of August! 😊
 
 
 
Write a reply… Reply
Submit reply

Register

Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. Oops, you need to agree to our Ts&Cs to register
  2. Slide to join now Processing…

Updated: June 15, 2016
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

Poll
Do you think you'll achieve your predicted A Level grades?
Applying to university

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.