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Edexcel - Chemistry Unit 2 - 4 June 2013 Watch

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    (Original post by HarryMWilliams)
    An A would be great, although I will accept a high B.
    Good stuff, I'm already on a high B, but I need an A for uni, haha.
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    (Original post by James A)
    Good stuff, I'm already on a high B, but I need an A for uni, haha.
    Something pharmaceutical related, right?
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    (Original post by HarryMWilliams)
    Something pharmaceutical related, right?
    Pharmacy

    Yourself?
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    (Original post by James A)
    Pharmacy

    Yourself?
    Biomed myself.
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    (Original post by HarryMWilliams)
    Biomed myself.
    This is out of topic, but what does a biomed do?

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    (Original post by Relaxedexams)
    This is out of topic, but what does a biomed do?

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    I'm not interested in becomming an NHS Biomedical Scientist (who screen for diseases etc. - http://www.nhscareers.nhs.uk/explore...dical-science/), I'm more interested in post-graduate research and the biomedical degree sets me up perfectly for that with it's combination of biochemistry and human biology.
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    (Original post by geor)
    Yeah I might do that - it's not really the knowledge though it's the questions? I never really get what they are asking for? :confused:
    This is me all over, I know the ins and outs of the syllabus but when it comes to the questions, my mind goes blank cos I never know what they're looking for yet I look at the mark scheme and I knew I could have answered that it's so frustrating! :mad:
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    guys, I was doing the cgp revision guide and theres this question I came across
    What type of substance is formed when a hydrogen halide is passed through water?

    I know the answer to this might be pretty simple but I don't know maybe its just all the staying up and stressing out cause of the exams thats messing with my head :P
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    (Original post by Zoeyyy)
    guys, I was doing the cgp revision guide and theres this question I came across
    What type of substance is formed when a hydrogen halide is passed through water?

    I know the answer to this might be pretty simple but I don't know maybe its just all the staying up and stressing out cause of the exams thats messing with my head :P
    What do you think the answer is..?
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    (Original post by HarryMWilliams)
    What do you think the answer is..?
    Acidic solution?
    I just get confused about weird stuff at weird times excuse me for that Lol
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    (Original post by Zoeyyy)
    Acidic solution?
    I just get confused about weird stuff at weird times excuse me for that Lol
    It is a strange question, nothing like that has ever come up in my Unit 2 adventures I dont think, anywhoo the reaction goes:
    H2O + HBr ---> H3O+ + Br2.
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    (Original post by HarryMWilliams)
    It is a strange question, nothing like that has ever come up in my Unit 2 adventures I dont think, anywhoo the reaction goes:
    H2O + HBr ---> H3O+ + Br2.
    Shouldn't Br- be present instead of Br2 as a product??

    But yeah,

    (Original post by Zoeyyy)
    Acidic solution?
    I just get confused about weird stuff at weird times excuse me for that Lol
    You do get an acidic solution. The hydronium ion makes it acidic.
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    (Original post by Zoeyyy)
    guys, I was doing the cgp revision guide and theres this question I came across
    What type of substance is formed when a hydrogen halide is passed through water?

    I know the answer to this might be pretty simple but I don't know maybe its just all the staying up and stressing out cause of the exams thats messing with my head :P
    H3O+


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    (Original post by HarryMWilliams)
    It is a strange question, nothing like that has ever come up in my Unit 2 adventures I dont think, anywhoo the reaction goes:
    H2O + HBr ---> H3O+ + Br2.
    Balance it. H2O + HBr -> H3O+ + Br-


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    thanks guys
    also, what would you observe when bromine water is mixed with potassium chloride solution?

    (Original post by HarryMWilliams)
    It is a strange question, nothing like that has ever come up in my Unit 2 adventures I dont think, anywhoo the reaction goes:
    H2O + HBr ---> H3O+ + Br2.
    Yeah 'cause its not an exam style question, just a practice question. And I wanted to make sure I dont have any doubts so Im on the safe side
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    (Original post by Zoeyyy)
    thanks guys
    also, what would you observe when bromine water is mixed with potassium chloride solution?
    No reaction. No change.

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    (Original post by Relaxedexams)
    No reaction. No change.

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    And why is that?
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    (Original post by Zoeyyy)
    And why is that?
    Chlorine is more reactive than bromine therefore bromine cannot displace it.

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    (Original post by Relaxedexams)
    Chlorine is more reactive than bromine therefore bromine cannot displace it.

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    This.
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    I do AQA but them topics are basically what I do:P I hate group 7 and redox! Ughhhh there is SOOO MUCH TO REMEMBER! Like I hate how you have to remember the observations for each halide, so annoying :/ And redox, well need I say anything about that? Half equations will be the cause of my death
 
 
 
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