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    (Original post by WillsWheels)
    Lets Hit the Big 40 posts. Hmmm...

    Explain why graphite can conduct electricity.
    Each carbon atom forms 3 covalent bonds (not it's maximum 4) so the one outer shell electron left is free to move within the structure. These delocalised electrons can carry electrical charge.

    Question: Why is water formed when acids react with alkalis in a neutralisation reaction?
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    Bonded only to 3 other carbons, leaving 1 delocalised electron in highest energy level that can carry charge
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    (Original post by alchima)
    each carbon atom forms 3 covalent bonds (not it's maximum 4) so the one outer shell electron left is free to move within the structure. These delocalised electrons can carry electrical charge.

    Question: Why is water formed when acids react with alkalis in a neutralisation reaction?
    oh- + h+ --> h2o
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    (Original post by alchima)
    Each carbon atom forms 3 covalent bonds (not it's maximum 4) so the one outer shell electron left is free to move within the structure. These delocalised electrons can carry electrical charge.

    Question: Why is water formed when acids react with alkalis in a neutralisation reaction?
    because the acid contains hydrogen and the base contains oxygen
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    How can an ester be made from glucose? (6mks - think C1 + C3)
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    (Original post by alchima)
    Each carbon atom forms 3 covalent bonds (not it's maximum 4) so the one outer shell electron left is free to move within the structure. These delocalised electrons can carry electrical charge.

    Question: Why is water formed when acids react with alkalis in a neutralisation reaction?
    because the ionic equation is: H+ + OH- --> H2O?
    So for example:
    NaOH + HCl --> NaCl + H2O
    Na+ + OH- + H+ + Cl- --> Na+ + Cl- + H2O

    Na+ and Cl- are spectator ions so the only ones that change are H+ and OH- which form H2O?

    idk lol
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    (Original post by FutureDietitian)
    How can an ester be made from glucose? (6mks - think C1 + C3)
    no idea please tell us
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    I agree - Do spill
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    (Original post by FutureDietitian)
    How can an ester be made from glucose? (6mks - think C1 + C3)
    - fermentation of glucose by yeast to form ethanol and carbon dioxide
    - ethanol is distilled to purify it
    - alcohol + carboxylic acid (+ strong acid catalyst) <--> ester + water
    - so add carboxylic acid to this ethanol produced to produce ester?
    never seen something like this so idk :lol:
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    Describe the main stages of the Haber Process [4 marks]
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    (Original post by surina16)
    because the ionic equation is: H+ + OH- --> H2O?
    So for example:
    NaOH + HCl --> NaCl + H2O
    Na+ + OH- + H+ + Cl- --> Na+ + Cl- + H2O

    Na+ and Cl- are spectator ions so the only ones that change are H+ and OH- which form H2O?

    idk lol
    yeah that's right
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    Yes but remember a carboxylic acid can be made by oxidising a primary alcohol. So you can take half of the alcohol produced, oxidise it, add it to the original = ester
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    (Original post by surina16)
    Describe the main stages of the Haber Process [4 marks]
    Nitrogen from the air and hydrogen from natural resources are mixed together in a closed machiene. They mix to make ammonia in the machiene and make liquid ammonia, this is condensed to form liquid ammonia which is filtered off. Remaining hydrogen and nitrogen are reused and mixed again.
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    (Original post by Abihun04)
    Nitrogen from the air and hydrogen from natural resources are mixed together in a closed machiene. They mix to make ammonia in the machiene and make liquid ammonia, this is condensed to form liquid ammonia which is filtered off. Remaining hydrogen and nitrogen are reused and mixed again.
    ;-; Ask?

    Aluminium is a metal.

    Explain why Aluminium can conduct electricity.
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    (Original post by Bulletzone)
    ;-; Ask?

    Aluminium is a metal.
    I
    Explain why Aluminium can conduct electricity.
    Contains free electrons which carry the electronic charge throughout the metal..

    What is the structure of diamond??
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    (Original post by Abihun04)
    Contains free electrons which carry the electronic charge throughout the metal..

    What is the structure of diamond??
    Diamond forms strong covalent bonds with 4 other carbon atoms. It is a giant covalent structure.

    Why can graphite conduct electricity?
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    (Original post by Abihun04)
    Contains free electrons which carry the electronic charge throughout the metal..

    What is the structure of diamond??
    Diamonds are giant covalent structures
    Each carbon atom will form four covalent bonds in a rigid structure which makes diamond the hardest natural substance

    Q: if i dissolved a small amount of solid in water,added sodium hydroxide and a red/brown precipitate formed.. What would the cation be?
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    (Original post by Dana22)
    Diamond forms strong covalent bonds with 4 other carbon atoms. It is a giant covalent structure.

    Why can graphite conduct electricity?
    each carbon atom in graphite contains one delocalised electron which can conduct heat and electricity

    Q:what properties do halogens have? And why
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    Iron3+
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    (Original post by k.m.b)
    each carbon atom in graphite contains one delocalised electron which can conduct heat and electricity

    Q:what properties do halogens have? And why
    Very reactive - only need to gain one electron for stable noble gas configuration.
 
 
 
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