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    (Original post by redsoules)
    Colorless. Clear and transparent will likely get you no marks.
    How would it get you no marks when colourless was the answer to the question?
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    I wrote Co2 for the black substance, would it be right?
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    (Original post by Charlie223)
    How would it get you no marks when colourless was the answer to the question?
    Yeah colourless was the right answer.


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    The answer to the balance equation was.
    iron oxide + carbon → iron + carbon dioxide2Fe2O3 + 3C → 4Fe + 3CO2It's on bitesize and a simple google search
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    For the black substance made at the bottom, would soot accepted instead of carbon particles
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    (Original post by Charlie223)
    For the black substance made at the bottom, would soot accepted instead of carbon particles
    yup soot is the proper name for it
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    (Original post by waagh)
    If you only said you need a catalyst and not a hot catalyst would you get the mark?
    Yes sorry I meant to put in brackets
    I only put catalyst on my paper anyway
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    am i allowed to talk about electrolysis for the hydrogen advantages , did the question ask for your own knowledge?
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    (Original post by Ellieeeyh)
    thanks victor!!
    It's ok Hun
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    (Original post by bash12345)
    I dont think ive done very good on this paper i think i got aprox 40marks which is going to be a C or D i assume :L
    40 will be a B dont worry, i reckon the grade boundaries will be the same as last year and if they do it will only change by a couple of marks
    A*=50
    A=41
    B=31
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    How did you remember all of this??? And how are you certain that these are all correct/the only answer??

    Not trying to show you up or anything, just genuinely curious as to how this was possible.
    Spoiler:
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    I'd give double rep if i could
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    (Original post by A_Tesco_Manager)
    Ethene is hydrated with steam to produce ethanol. However this is impure and needs to be distilled to remove the impurities
    From what I've read, the only product is ethanol so this reaction produces pure ethanol and therefore is an advantage compared to fermentation
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    Absolutely brilliant! Thank you for posting this - has given me a bit of confidence :-)
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    Could you do a foundation mark scheme please? thanks
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    Damnit I think I only got about 40!!! I need 50 in all units to get an A* overall (due to my crap ISA grade)
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    I found this exam great compared to the Biology, hoping I got at least 50 out of 60.
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    Can I suggest an answer....
    For the how to make the experiment more accurate (something like that) I wrote...
    Put a board/something around the apparatus so not draught affects it and the flame is always concentrated under the flask so doesnt move about.
    Because we did that experiment at school and the flame kept moving away from the flask as someone walked by for example.
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    (Original post by ScienceFantatic)
    Question 1
    Electron shell: 2,3( 1 mark)
    Nucleus( 1 mark)
    Neutron is uncharged, proton has a charge of +1 ( 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: the lower the metal on the reactivity series, the easier it is broken down(2)

    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)

    2Fe2O3+ 3C = 4Fe+ 3CO2( 2 marks)

    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, reacted with hydrogen, 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)

    Mark somewhere for completing drawing of the alkane(1)

    Bromine goes colourless somewhere(1)

    Took me a while to make so any rep would be much appreciated
    i screwed up on last question because i said that it converts saturated to unsaturated whereas it was the other way round, but i still think ill get 2 or 3 marks for explaining health risks, margarine made this way, and solid at room temperature
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    (Original post by ScienceFantatic)
    Question 1
    Electron shell: 2,3( 1 mark)
    Nucleus( 1 mark)
    Neutron is uncharged, proton has a charge of +1 ( 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: the lower the metal on the reactivity series, the easier it is broken down(2)

    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)

    2Fe2O3+ 3C = 4Fe+ 3CO2( 2 marks)

    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, reacted with hydrogen, 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)

    Mark somewhere for completing drawing of the alkane(1)

    Bromine goes colourless somewhere(1)

    Took me a while to make so any rep would be much appreciated
    i reckon the yeast question is one mark for saying yeast then one mark for saying a fermentation process happens
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    (Original post by longshot100)
    How did you remember all of this??? And how are you certain that these are all correct/the only answer??

    Not trying to show you up or anything, just genuinely curious as to how this was possible.
    Spoiler:
    Show
    I'd give double rep if i could
    I think they're all correct . And idk I just have a decent memory I guess
 
 
 
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