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    (Original post by reveen)
    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
    Awww damn it haha but thanks for the explanation


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    (Original post by Aaaaa01)
    Yea. Was that insulator? The ion bridge thing


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    Yeah it was ion bridge
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    (Original post by Aaaaa01)
    Set up 2 apparatus and for each experiment use one brand and another bran for the other experiment. Then heat it and the carbon dioxide will pass through the delivery tube into the test tube with lime water in it. Check what test tube is cloudier and the cloudier one will hav more carbon dioxide since lime water turns carbon dioxide cloudy.
    I talked about the limewater experiment. I also talked about using a ph indicator as the one with the most carbon dioxide will be the most acidic. I also mentioned about a titration and my teacher said I was on the right tracks
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    (Original post by Jay431)
    Yeah it was ion bridge
    I've always been taught to call it a salt bridge, do you think I'll lose any marks for calling it that instead of 'ion bridge'?


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    I have a question... For the Heat energy question what was the heat energy they give you in KJ

    And also

    Why didn't they have a double bond in the shortened structural formula for that question...
    I was just following what it put for me, Am I just supposed to look at it and put a double bond ? If I did it wouldn't replicate the structural formula they gave us
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    Hey guys for the battery question in paper 2. I wrote electrolyte. i am feeling pretty confident that this is the correct answer. what are your opinions?
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    For the Heat energy question there were two methods, method A and B. What did you pick and why ?
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    (Original post by Ethan100)
    I have a question... For the Heat energy question what was the heat energy they give you in KJ

    And also

    Why didn't they have a double bond in the shortened structural formula for that question...
    I was just following what it put for me, Am I just supposed to look at it and put a double bond ? If I did it wouldn't replicate the structural formula they gave us
    You should know that there is a double bond because the number of bonds carbon forms is four. But in the molecular formula there was not enough atoms to join with the molecule indicating that there is a double bond. If you look at a previous post i have explained it thoroughly
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    (Original post by reveen)
    You should know that there is a double bond because the number of bonds carbon forms is four. But in the molecular formula there was not enough atoms to join with the molecule indicating that there is a double bond. If you look at a previous post i have explained it thoroughly
    Isn't it compulsory to include double and triple bond signs into shortened structural formula?


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    (Original post by Ethan100)
    For the Heat energy question there were two methods, method A and B. What did you pick and why ?
    i picked method A as in method B the mass of the spirit burner is reduced more as we have to wait until it is lit and then put under the copper can meaning that in method b more of the alcohol is used. Therefore method A is more accurate.
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    (Original post by Abbyy1234)
    Isn't it compulsory to include double and triple bond signs into shortened structural formula?


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    Yes it is depending on what hydrocarbon.
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    (Original post by Ethan100)
    I have a question... For the Heat energy question what was the heat energy they give you in KJ

    And also

    Why didn't they have a double bond in the shortened structural formula for that question...
    I was just following what it put for me, Am I just supposed to look at it and put a double bond ? If I did it wouldn't replicate the structural formula they gave us
    Pretty sure the heat released was 23
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    (Original post by Abbyy1234)
    Isn't it compulsory to include double and triple bond signs into shortened structural formula?


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    Thats what Im trying to say...
    For example if it was the other way around if they said to write the short structural formula we would lose marks if we missed out the double bonds. I know the chemistry involved when writing the full structural formula so I was just copying what I was given. I understand why its a double bond though
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    (Original post by reveen)
    i picked method A as in method B the mass of the spirit burner is reduced more as we have to wait until it is lit and then put under the copper can meaning that in method b more of the alcohol is used. Therefore method A is more accurate.
    Yeah that's what I did too, You are losing Mass even before the experiment has actually started which will result in inaccurate results...
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    (Original post by reveen)
    Hey guys for the battery question in paper 2. I wrote electrolyte. i am feeling pretty confident that this is the correct answer. what are your opinions?
    I put electrolyte too


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    (Original post by Ethan100)
    Thats what Im trying to say...
    For example if it was the other way around if they said to write the short structural formula we would lose marks if we missed out the double bonds. I know the chemistry involved when writing the full structural formula so I was just copying what I was given. I understand why its a double bond though
    so then what are you confused about then if you knew it had a double bond?
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    (Original post by Ethan100)
    Thats what Im trying to say...
    For example if it was the other way around if they said to write the short structural formula we would lose marks if we missed out the double bonds. I know the chemistry involved when writing the full structural formula so I was just copying what I was given. I understand why its a double bond though
    It's so annoying though because all these little 1 mark answers are starting to add up and I'm freaking out now :/


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    (Original post by Puppo)
    Pretty sure the heat released was 23
    Thanks
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    (Original post by Ethan100)
    Thanks



    was it 23 i am pretty sure u got the wrong answer
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    (Original post by reveen)
    so then what are you confused about then if you knew it had a double bond?
    I don't know,, Doing any questions from nature's chemistry I was never taught by anyone that when you are given a short structural formula that has an insufficient amount of bonds for a certain atom (In this case carbon) to draw a double bond.

    Oh well its done now, Thanks Reveen
 
 
 
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