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    (Original post by samb1234)
    For what reaction?

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    In converting am alcohol to a bromoalkane by reacting it with potassium bromide and 50% sulfuric acid to be precise. But a general answer is okay too
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    (Original post by Basma Rahman)
    In converting am alcohol to a bromoalkane by reacting it with potassium bromide and 50% sulfuric acid to be precise. But a general answer is okay too
    I think in that reaction you have to create the hbr in situe by reacting the h2so4 with KBr which then reacts with the alcohol to form the bromalkane

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    (Original post by samb1234)
    I think in that reaction you have to create the hbr in situe by reacting the h2so4 with KBr which then reacts with the alcohol to form the bromalkane

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    Thanks!
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    (Original post by Basma Rahman)
    Thanks!
    Probably ought to check that is right I'm doing edexcel too bit I'm only half way through unit 2 revision. Feel free to ask any other questions

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    (Original post by C0balt)
    It's either because you need to fully oxidise or the reaction is slow or the reactants/products are volatile


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    Got it ! So it's to speed up the reaction without boiling it off Thanks!
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    (Original post by samb1234)
    Probably ought to check that is right I'm doing edexcel too bit I'm only half way through unit 2 revision. Feel free to ask any other questions

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    Giving exams this May?
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    (Original post by Basma Rahman)
    Giving exams this May?
    Yes I'm taking as this may

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    (Original post by samb1234)
    I think in that reaction you have to create the hbr in situe by reacting the h2so4 with KBr which then reacts with the alcohol to form the bromalkane

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    That is true but it doesn't explain why reflux is needed.

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    (Original post by C0balt)
    That is true but it doesn't explain why reflux is needed.

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    As said earlier, because the reaction itself Is slow and volatile, so we need to speed it up without boiling it off.
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    (Original post by Basma Rahman)
    As said earlier, because the reaction itself Is slow and volatile, so we need to speed it up without boiling it off.
    Out of interest what marks did you get in the practicals?

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    (Original post by samb1234)
    Out of interest what marks did you get in the practicals?

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    I didn't give the practicals, that's why I'm giving unit 3B instead if unit 3
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    (Original post by Basma Rahman)
    I didn't give the practicals, that's why I'm giving unit 3B instead if unit 3
    Sounds much harder

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    (Original post by samb1234)
    Sounds much harder

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    I think they're both the same really, one's written and the other one's, well , practical
    How did you do on your practicals btw? Is it hard or easy?
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    (Original post by Basma Rahman)
    I think they're both the same really, one's written and the other one's, well , practical
    How did you do on your practicals btw? Is it hard or easy?
    I got 40/40. The practicals are really quite easy

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    (Original post by samb1234)
    I got 40/40. The practicals are really quite easy

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    Oh wow. Wish I had

    I'm super scared for my AS. Many people I know repeated. Which is a total bummer because many of them did awesome in their GCSE :/
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    (Original post by Basma Rahman)
    Oh wow. Wish I had

    I'm super scared for my AS. Many people I know repeated. Which is a total bummer because many of them did awesome in their GCSE :/
    I want to apply to Cambridge so I'm just trying to get as high a ums mark as I can

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    (Original post by samcrossley28)
    Did anyone get FULL MARKS (or close) in the thermal decomposition ISA?
    Which Thermal Decomp ISA do you mean?
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    (Original post by l1lvink)
    Which Thermal Decomp ISA do you mean?
    zinc carbonate? what did u get in it.

    If youve done milk of magnesia what u get in that also?
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    (Original post by samb1234)
    I want to apply to Cambridge so I'm just trying to get as high a ums mark as I can

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    Well best of luck! ^_^
    We all need it though
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    (Original post by samb1234)
    I want to apply to Cambridge so I'm just trying to get as high a ums mark as I can

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    Ah that's great, what course are you going for?

    You've got the right attitude.
 
 
 
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