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    (Original post by GeorgeMillerr)
    What is the process of hydration of ethene:
    State the conditions required and the product produced
    Hydration of ethene is when ethene is reacted with steam to produce ethanol in the presence of a catalyst.

    And in terms of conditions, I don't think you need to know them but I think it's high temperature (that's the condition for many things in chemistry so I'm just guessing)
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    (Original post by IAmAnTroll)
    What is hardening / hydrogenation?
    Reacting unsat oils with hydrogen, opens up some double bonds.
    60 degrees, Nickle catalyst.
    Good shelf life and cheap for making things like buiscuits
    Lots a naughty trans fat which ain't good for ya pal.
    Bob's your uncle (psychic tell me about it)
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    (Original post by kefalos23)
    Give two examples of alloys (2)
    Stainless Steel

    Low Carbon Steel
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    (Original post by kefalos23)
    Give two examples of alloys (2)
    Steel and Cupronickel
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    (Original post by kefalos23)
    Give two examples of alloys (2)
    Steel: Carbon and Iron
    Brass: Copper and Zinc
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    (Original post by kefalos23)
    Give two examples of alloys (2)
    Bronze and steel - copper and tin and iron and carbon, add chromium for a fancy finish (stainless steel)
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    What is metal fatigue? (In the spec)
    • Thread Starter
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    Describe the order of alkanes and alkenes...

    E.g. Methane
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    What are the features of an emulsifier molecule? (2)
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    Explain Wegner's continental drift theory (what he noticed and the actual theory)
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    (Original post by t10r)
    Hydration of ethene is when ethene is reacted with steam to produce ethanol in the presence of a catalyst.

    And in terms of conditions, I don't think you need to know them but I think it's high temperature (that's the condition for many things in chemistry so I'm just guessing)
    Yes correct, it would be a temperature above 100 degrees hence the steam but you don't need to know the exact temperature but a range of 100-400 will suffice,
    Now you've answered that hence give me another way of making ethanol
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    (Original post by JakeMcLellan)
    What is metal fatigue? (In the spec)
    When strain and stress is put on to the metal, causing it to break, which can be dangerous
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    (Original post by kefalos23)
    What are the features of an emulsifier molecule? (2)
    Hydrophilic head
    Hydrophobic tail
    In reverse for oil
    Tail sticks in the oil, head repeals other oil particles.
    Oil is left suspended and shaking the mixture seperates them
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    (Original post by chocomad1999)
    When strain and stress is put on to the metal, causing it to break, which can be dangerous
    Omg do we need to no this 😂😂
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    (Original post by kefalos23)
    What are the features of an emulsifier molecule? (2)
    An emulsifier molecule has two parts: hydrophobic and hydrophilic. The hydrophobic part stretches out and attaches to the water whereas the hydrophobic part stays inside the oil droplet.

    Just as an additional note, the way the emulsifier allows the water and oil to mix is that the hydrophobic parts are negatively charged so they repel other negatively charged hydrophobic parts from other oil droplets. This allow the droplets to be spread across the water. Also, the emulsifier make the oil droplets unable to separate as the hydrophobic part is attached to the water and hydrophilic to the oil.
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    (Original post by IAmAnTroll)
    Describe the order of alkanes and alkenes...

    E.g. Methane
    General formulas:

    Alkane - CnH2n+2
    Alkene - CnH2n

    Alkanes finish in ANE
    Alkenes finish ENE

    Order:
    1.Meth...
    2.Eth...
    3.Prop...
    4.But...
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    (Original post by IAmAnTroll)
    Describe the order of alkanes and alkenes...

    E.g. Methane
    Meth
    Eth
    Prop
    Bute
    Pent
    Hex
    Adding the suffix of 'ane' if its an alkane and the suffix of 'ene' if its an alkene
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    What's a limited company? XD
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    (Original post by EmmanuellaUwaifo)
    Omg do we need to no this 😂😂
    Yep! I hoped I've helped!
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    (Original post by EmmanuellaUwaifo)
    Omg do we need to no this 😂😂
    tbh, I'm not sure but I've learned it
 
 
 
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