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    Really awaiting that unofficial markscheme. Have no idea how this went. Very different from other papers in my opinion
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    (Original post by MBrooke)
    Really awaiting that unofficial markscheme. Have no idea how this went. Very different from other papers in my opinion
    Where is it released? And how long does it normally take for an unofficial mark scheme to come out?
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    What did people put for the vapours thing about high temperatures??
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    (Original post by Ferdous Shah)
    Where is it released? And how long does it normally take for an unofficial mark scheme to come out?
    Usually someone writes one and puts it on student room. Not guaranteed but usually some one does one. I believe teachers get the paper tomorrow (correct if wrong) so like maybe more information can be found or tomorrow .

    Really don't blame me if an unofficial doesn't come out though lol
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    (Original post by Zuzuvela)
    Never come up before. It was vague so I talked about orders with respect to enzyme and substrate. Basically first order and after the plateau zero order. Both involved in rds as both in rate equation rds was the first step as it was reversible?

    Not 100% sure then again nobody is

    Posted from TSR Mobile
    RDS was the first one and then swapped to second one just before plateau
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    (Original post by thelizzister)
    For the question asking to draw the structure of the E/Z isomers was it supposed to be drawn as skeletal or full structural?
    It just said structural so you can draw anything
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    It asked to discuss. Does that mean you were meant to give reasons for why it might increase and why it might decrease?
    (Original post by charliexox)
    What did people put for the vapours thing about high temperatures??
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    Guys is there an Facebook group for Salters chem because I want to put this behind me and get in gear for F335

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    Would anyone like fries with that?
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    (Original post by HecTic_H)
    1.
    Secondary structure -
    Tertiary structure -

    Describe active site and it's function -

    Partial hydrolysis of trypsin -

    Benefits of trypsin > bromate (v) catalyst - higher atom economy, speeds up reaction, reduces need for flammable/toxic solvents

    5 marker on ESC, EP, rate orders and substrates stuff -

    Rate of reaction at 70 degrees -

    2.

    Electrodes / tank, which solution? -

    Coating steel? - zinc

    Why was there a membrane -
    Salt bridge

    Iron forming red brown precipitate

    3.
    Bromine number

    Prove excess

    Bromine number [5] -

    Why was there E/Z isomerism? - CC double bonds cant rotate

    Draw isomers

    Transition metal heterogeneous catalysis - provides a solid surface for reactants to adsorb to; 3d electrons make weak bonds to hold them in place

    Following BrO3- reaction -

    Rate equation -

    Temperature affecting reaction rate? - increases and value of k increases

    4.

    Draw polyester -

    What condensation polymer is this?-
    Polyester

    Why did Carothers go ahead with polyamides?

    5.

    Oxidising aldehyde to carboxylic acid -
    Acidified dichromate

    IR spectrum -
    Apocylsin

    Mass spectrum -

    Recrystallisation -

    Nucleophillic substitution -


    Can we get going at filling that, I might have missed a few questions and only answered the ones for certain.

    added a couple that i can remember/am comfortable with but please change them if theyre wrong!!
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    (Original post by _MAT_)
    It just said structural so you can draw anything
    thank goshhhhhh! thank you so much I can now stop dwelling over it

    Also is anybody's next exam f335?
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    Was the standard electrode potential for the vanadium system +1.80 V?
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    I go 195g, not sure where people got the 390g from as the mass of the c6h10 was 82 then bromine is 79.9x2 so you do (79.9x2)/ 82 then multiply that by 100
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    (Original post by James476)
    Was the standard electrode potential for the vanadium system +180 V?
    That is what I got too because didn't it say they needed to have the same sign?
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    (Original post by Daniel9998)
    I put first order for both. The rate never quadrupled so it cant be second order
    I put first order for both too and it was zero order with respect to (bro3-) i think
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    (Original post by thelizzister)
    thank goshhhhhh! thank you so much I can now stop dwelling over it
    Ahahah if you want to stop dwelling I suggest stop watching this thread
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    (Original post by LewisEdwards1234)
    I go 195g, not sure where people got the 390g from as the mass of the c6h10 was 82 then bromine is 79.9x2 so you do (79.9x2)/ 82 then multiply that by 100
    It requires 2 moles of bromine

    Posted from TSR Mobile
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    (Original post by charliexox)
    What did people put for the vapours thing about high temperatures??
    - at higher temperatures increased value of rate constant/K, so the rate of reaction will change/increase
    - as volatiles are lost, concentration of reaction changes/decreases
    - change in concentration of reactants will change the rate of reaction

    That's what I put anyway, where i just wrote 'change/decrease' I'm pretty sure in the exam I just put 'change'
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    (Original post by LewisEdwards1234)
    That is what I got too because didn't it say they needed to have the same sign?
    It was -0.26
    By it has the same sign it was talking about the iron I believe
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    1.
    Secondary structure -
    Tertiary structure -

    Describe active site and it's function -

    Partial hydrolysis of trypsin -

    Benefits of trypsin > bromate (v) catalyst - higher atom economy, speeds up reaction, reduces need for flammable/toxic solvents

    5 marker on ESC, EP, rate orders and substrates stuff -

    Rate of reaction at 70 degrees -

    2.

    Electrodes / tank, which solution? -

    Coating steel? - zinc

    Why was there a membrane -
    Salt bridge

    Iron forming red brown precipitate

    3.
    Bromine number

    Prove excess

    Bromine number [5] -

    Why was there E/Z isomerism? - CC double bonds cant rotate and 2 different groups

    Draw isomers

    Transition metal heterogeneous catalysis - provides a solid surface for reactants to adsorb to; 3d electrons make weak bonds to hold them in place

    Following BrO3- reaction -

    Rate equation -
    first order, first order, second order.

    Temperature affecting reaction rate? - increases and value of k increases

    4.

    Draw polyester -

    What condensation polymer is this?-
    Polyester

    Why did Carothers go ahead with polyamides?

    5.

    Oxidising aldehyde to carboxylic acid -
    Acidified dichromate

    IR spectrum -
    Apocylsin

    Mass spectrum -
    ook for peak firthest right apocysin 166 vanillin is 155

    Recrystallisation -

    Nucleophillic addition -

    Not gonna add any others now, just copy and paste the post instead of quoting if you want to add.
 
 
 
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