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    I think that the question about reactivity was : the higher the reactivity the more energy needed/ the harder it was
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    (Original post by ScienceFantatic)
    Question 1
    Electron shell: 2,3( 1 mark)
    nucleus( 1 mark)
    ( +1), electrons( -1), neutron is uncharged( 3 marks)

    Not in form 2,8,8, has 1,8Boron has 10 electrons, the structure had 9 electrons( 3 marks)

    Question 2
    Tick box: copper oxide(1)

    20.3(2 marks)

    Digital thermometer, more precise and not subject to human error
    Beaker insulated(2)

    Carbon particles produced( particulates)Insufficient oxygen or incomplete combustion(2)

    Best fuel because it produces least smoke/ burns the most cleanly. Produces the most energy per g(2)

    Question 3
    Advantages of hydrogen
    Only product water
    Renewable
    Provides more energy
    No co2 or s02 released

    Disadvantages
    Hydrogen is explosive
    Hard to store because it is a gas
    From natural gas( methane which is a greenhouse gas)
    Engines need to be converted( 6 marks)

    Thermal decomposition(1)

    Question on potassium carbonate: doesn't fully thermally decompose, co2 not released, Bunsen burner temperature is not high enough( 3 marks)

    Reactivity question: anyone got suggestions? Think my answer is wrong (2 marks)

    Question 4:
    Conditions for cracking: high temperatures and a hot catalyst(2)

    Fermentation question: sugar is dissolved and yeast is added to make ethanol(2)


    Ethanol question: ethene is reacted with steam at high temperatures and catalyst(2)

    Advantages and disadvantages of crude oil vs plants: Crude oil is a continuous process so faster, crude oil is more widely available, crude oil more reliable and things are set up for crude oil fractions

    Non renewable, co2( global warming), SO2

    (4 marks)

    Question 5
    metal ores are ores which contain enough of the metal to be worthwhile extracting( 1 mark)

    It is converted to steel because cast iron is brittle or to make it stronger
    Steel has more uses
    Corrosion resistant
    ( 2 marks)

    4Fe2O3+ 3C = 4Fe+ 3CO2( 2 marks) - This ans is now correct, as iron is not diatomic

    It is not sent to landfill because this takes up space and causes pollution
    It is not reused as it might have lost its strength and become unstable. Saves energy being used. Conserves raw materials
    3 marks)

    Question on distillation: Heat mixture between 80-99 degrees, the ethanol evaporates, cools and condenses to form pure ethanol and then raise temperature to 100 when all ethanol has evaporated to do the same to water( 3 marks).

    Question on carbon neutral: carbon dioxide is a greenhouse gas
    This takes up CO2 when it grows in photosynthesis
    The same amount is released when biofuel or oils are burned
    So no overall increase in CO2
    Continuous Carbon Cycle(3)

    Last question on hydrogenation; 60 degrees, nickel catalyst, double bonds converted into single bonds, increasing boiling point, done so that's it's a solid at room temperature for a thick, spreadable consistency (5)

    58 marks
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    (Original post by lunaticash19995)
    yeah I think you basically had to describe fractional distillation but with ethanol and water instead of crude oil
    its the separation of gases..in textbook where it gets put in distillation column
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    (Original post by Jamie Vardy)
    Would I get aluminium oxide catalyst?
    yes, that is the precise catalyst
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    (Original post by kheerthi)
    Changed
    Idk my revision guide supports what I wrote
    Attached Images
      
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    For the distillation question, do you reckon heating it all to over 100 and then cooling it in stages will get marks?
    Both methods work but I'm worried the mark scheme will focus on one.
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    (Original post by kheerthi)
    Changed
    that is incorrect as the answer is no longer balanced.
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    was the reactivity not todo with pottasium is at the top so requires more energy to decompose where as copper is closer to the bottom and had a difference of 3.1g
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    (Original post by M451)
    For the distillation question, do you reckon heating it all to over 100 and then cooling it in stages will get marks?
    Both methods work but I'm worried the mark scheme will focus on one.
    Not sure rly.
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    Thank god, I got that too. Some people from my school said that the answer was 4.

    (Original post by ScienceFantatic)
    Idk my revision guide supports what I wrote
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    (Original post by redsoules)
    ahh yeah my bad. just couldn't remember. Can't even remember what I wrote mainly. some of the stuff in that first post (of mine) were what I wrote, what you think?
    You probably will get one mark for it if the odds are in your favour.
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    (Original post by lunaticash19995)
    that is incorrect as the answer is no longer balanced.
    the question already gave a little 2 next to the Fe so it isn't a big 4, for the first part of the equation
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    (Original post by M451)
    For the distillation question, do you reckon heating it all to over 100 and then cooling it in stages will get marks?
    Both methods work but I'm worried the mark scheme will focus on one.
    thats the correct
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    ScienceFantatic The balancing is wrong; the irons don't balance.
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    (Original post by Jamie Vardy)
    ScienceFantatic The balancing is wrong; the irons don't balance.
    exaactly
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    Wait ScienceFantatic it's okay it got changed. I some **** about Iron being diatomic!

    lillyholmes
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    (Original post by lillyholmes)
    the question already gave a little 2 next to the Fe so it isn't a big 4, for the first part of the equation
    yeah so its 2Fe2O3 + 3C -> 4Fe + 3CO2
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    (Original post by ScienceFantatic)
    In pretty sure it was just sub atomic particles of boron and relative charges
    Boron was the following question. The one I'm referring to asked you to refer to the structure of the nucleus.
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    (Original post by lunaticash19995)
    yeah so its 2Fe2O3 + 3C -> 4Fe + 3CO2
    yep! but this unofficial thing saying 4Fe at the start it isn't
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    (Original post by Resty)
    Boron was the following question. The one I'm referring to asked you to refer to the structure of the nucleus.
    Ah maybe I misread it then
 
 
 
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