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    HOW DID YOU ALL FIND THE AS EDEXCEL EXAM GUYS?

    C1 was very easy

    C2 Was mild

    C3B was very easy!
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    What should we write in the last part of 3B?

    And what is the reagent for adding a NH2 group to a haloalkane?
    ammonia or ammonia solution?
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    (Original post by keisiuho)
    What should we write in the last part of 3B?

    And what is the reagent for adding a NH2 group to a haloalkane?
    ammonia or ammonia solution?

    The 3b question: amount of the halo alkane in a test tube, and ethanool and AgNO3 in another and incubate at 30C for 15 minutes, then mix the two tubes, and find the time needed for PPTS to form, repeat, obtain AVG then repeat for all halo-alkanes!

    then you say, for

    I--------> yellow ppte
    Br-------> Cream ppte
    Cl-------> White ppte

    and then deduce the time needed:

    Chloro-alkane>Bromo-Alkane>Iodo-lkane


    I wrote ammonia SOln, but i think bot are right, a HX is formed as well!
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    i think the boundaries are gonna be really high for chem
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    i only did 1&2 (retakes) and i thought they were both fine. 2 was slightly harder, but ok.
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    i think if u get less than 5 marks off for each paper ull be fine...
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    (Original post by KOH)
    The 3b question: amount of the halo alkane in a test tube, and ethanool and AgNO3 in another and incubate at 30C for 15 minutes, then mix the two tubes, and find the time needed for PPTS to form, repeat, obtain AVG then repeat for all halo-alkanes!

    then you say, for

    I--------> yellow ppte
    Br-------> Cream ppte
    Cl-------> White ppte

    and then deduce the time needed:

    Chloro-alkane>Bromo-Alkane>Iodo-lkane
    I think not just the formation of ppt, but a certain amount of ppt formed
    And also it is a qualitative experiment rather than quantitative, so the exact time is not required but the RELATIVE TIMES, just as the question asked.

    Why need to repeat?
 
 
 
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