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    i said to make the ester into sodium ethanoate, you had to add water and h+ catalyst to break it up then naoh, then chromatograpy
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    (Original post by SirRaza97)
    No I don't think so, feelsbadman
    Fairly sure the reagent was Na2CO3 man
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    So which Donny is doing the mark scheme?
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    (Original post by thomaarrss)
    what did everyone out for Ka for a strong acid, i put it fully dissociates so a not needed, didn't know what to put for second mark??
    Yeah fully dissociates, Ka would be infinite (you would be dividing by 0)
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    (Original post by Bacardigan)
    Anyone know what happens to the rate equation if the experiment was repeated with 100x the concentration of ethanal but same concentrations of HCl and Iodine? I put that it would be the same...
    I said the rate equation becomes
    rate=k[H+] because the propanone concentration is so high that it becomes constant


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    (Original post by girl :D)
    i wrote the same reagent but i wrote effervescence for acyl chloride
    I think it could be either as its kind of the same, maybe ?
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    (Original post by t0310)
    What did people put for the test between the haloalkane and the acyl chloride?
    Add water
    Acyl chloride will give off white misty fumes
    Haloalkane will show no change
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    (Original post by SirRaza97)
    No I don't think so, feelsbadman
    You have to add NaOH and nitric acid for the white ppt to form with the haloalkane. The acyl is the one that forms the ppt.
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    (Original post by ethanstoddart)
    Thought I had it then turns out I made a tertiary alcohol :p:D


    SAMEEE. i was actually so happy thinking ive got it
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    (Original post by K2Cr2O7)
    I put H2O.
    haloalkane - no change
    Acyl chloride - misty fumes
    ???? not sure though
    I put H20
    acyl chloride - steamy fumes (i think its misty fumes passed over ammonia) and turns blue litmus paper red
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    (Original post by K2Cr2O7)
    I put H2O.
    haloalkane - no change
    Acyl chloride - misty fumes
    ???? not sure though
    I put that too


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    (Original post by Luke2shades)
    I thought maybe a simple tollens test would suffice but wasnt sure because of the Cl. So i did H2O to turn the acy chloride into an alcohol then use K2Cr2O7 turns orange to green
    I wrote tollens 😭😭
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    (Original post by thomaarrss)
    what did everyone out for Ka for a strong acid, i put it fully dissociates so a not needed, didn't know what to put for second mark??
    I put that Ka alters depending on the temperaure; an increase in temperature increases Ka. But I kinda guessed...
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    (Original post by Ayeros)
    wasn't the OH a singlet? In this case it would be a triplet. Not sure tho..
    The OH was a singlet and it is in what I wrote. OH is always singlet because the proton only connects to an O, which is basically a dead end when talking about splitting. So n=0. So n+1=1. So it's a singlet.
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    **** that paper

    Saddest thing is this is the exam I was feeling confident for.. God knows what unit 5 will be like
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    (Original post by thomaarrss)
    what did everyone out for Ka for a strong acid, i put it fully dissociates so a not needed, didn't know what to put for second mark??
    I had no idea.

    I said Ka is for weak acids only, weak acids partially dissociate so [HA] = [A-] (no idea) and that strong acids completely dissociate so [acid] doesn't remain constant or equilibrium lies far to RHS so [products] very high, [reactants] very low

    (Original post by t0310)
    AgNO3 does react with acyl cholrides tho
    It does.

    It's been in previous markschemes.
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    (Original post by High Stakes)
    Chemistry teachers looked at it and said it's relatively easy. Should be high grade boundaries.
    what are you talking about? teachers get past papers only 24h after exam...
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    can't it be add AgNO3
    steamy fumes for acyl chloride and nothing for the haloalkane?
    because haloalkane requires NaOH and HNO3 too in order to show observations
    (Original post by Ebaysass)
    Yep White Ppt of Agcl
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    guys pls what is ethanoic acid + nitric acid, where ethanoic acid acts as a base pls halp
 
 
 
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