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    (Original post by otrivine)
    I think between 0.02 to 0.04 something! in june 2011 how much difference did they accept , it was a huge variety right?
    They accepted 150% of the actual rate as the upper bound and 75% of the actual rate as the lower bound
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    (Original post by alow)

    They accepted 150% of the actual rate as the upper bound and 75% of the actual rate as the lowe bound
    you see lots of acceptable answer,

    people got 0.02 - 0.04 something
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    Okay guys start from Q1 and write all the answers with marks
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    question 1


    Define Lattice enthalpy 2 marks


    2) fil in gaps in hess cycle 2 marks

    3) name the steps 3 mark

    4) calculate lattice enthalpy

    5) factors affecting lattice enthalpy 3 marks
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    (Original post by hussaincute)
    Okay guys start from Q1 and write all the answers with marks
    Na you're alright.
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    question 2


    1) define half life ( 1 marks)

    2) provide using graph is first order ( 2 marks?)

    3) cant remember but 1 mark

    4) calculate rate ( 3 marks)

    5) calculate rate constant 2 marks

    6) why water is 0 order 1 mark
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    (Original post by fayled)
    Na you're alright.
    I am really stressd so plz let me count my total score
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    (Original post by otrivine)
    question 2


    1) define half life ( 1 marks)

    2) provide using graph is first order ( 2 marks?)

    3) cant remember but 1 mark

    4) calculate rate ( 3 marks)

    5) calculate rate constant 2 marks

    6) why water is 0 order 1 mark
    thanx man can u plz do all 8 questions
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    (Original post by MathsNerd1)
    I'm far from a machine, I'm only looking at 85+ most likely which tells you I still make mistakes and I don't only just revise I've got other things to put to my name so I'm just going to ignore you from now on as you clearly talk a load of crap!
    okay guys i think this chem paper has got this thread a bit heated. can you guys just calm down
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    (Original post by hussaincute)
    I am really stressd so plz let me count my total score
    People are already making one anyway, If you look a few pages back (some kind of online document) but they need to finish it before posting, and its not public cause people will delete it otherwise.
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    question 3 calculate pH at 0.14 mol dm-3 and describe the two acids (5 marks)

    4) write the two equations (2 marks)

    5) calculate pH of Naoh (2/3 ? marks)

    6) describe buffer (7 marks)

    7) calculate pH (6 marks)
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    By far one of the worst exams I have ever sat in my entire life. It started well, end just went downhill from there. /:
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    (Original post by fayled)
    People are already making one anyway, If you look a few pages back (some kind of online document) but they need to finish it before posting, and its not public cause people will delete it otherwise.

    I have seen that one and people have just made a joke of it so i need someone to actually make one ...
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    (Original post by lucindaellaaa)
    By far one of the worst exams I have ever sat in my entire life. It started well, end just went downhill from there. /:
    I knw this feeling :mad:
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    (Original post by hussaincute)
    thanx man can u plz do all 8 questions
    my answer

    1) Half life is the time taken with respect to rectant for concentration to reduce by half

    2) i used graph and stated is 1st order

    3) cant remeber question

    4) I got 0.02 something for rate , they will accept a range of answers I assume between 0.02something to 0.04 something units mol dm-3 s-1

    5) I said water is 0 order because not in rate equation along the lines?
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    (Original post by emah123)
    okay guys i think this chem paper has got this thread a bit heated. can you guys just calm down
    I'm calm I just don't like the fact he came on insulting people just because they were getting a lot of high marks and I assume he wasn't, also I was called inhuman so I just voiced my opinion, that's all
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    (Original post by otrivine)
    my answer

    1) Half life is the time taken with respect to rectant for concentration to reduce by half

    2) i used graph and stated is 1st order

    3) cant remeber question

    4) I got 0.02 something for rate , they will accept a range of answers I assume between 0.02something to 0.04 something units mol dm-3 s-1

    5) I said water is 0 order because not in rate equation along the lines?

    I think i have wrote pretty much same for everything except the rate question .... i was so dumb that i just looked at the concentration at 40s and calculated the rate using conc/time .... i completely forgot abt tangent calc
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    (Original post by hussaincute)
    I knw this feeling :mad:
    I don't understand how an exam paper can be so difficult ffs, I felt so stupid.
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    (Original post by otrivine)
    my answer

    1) Half life is the time taken with respect to rectant for concentration to reduce by half

    2) i used graph and stated is 1st order

    3) cant remeber question

    4) I got 0.02 something for rate , they will accept a range of answers I assume between 0.02something to 0.04 something units mol dm-3 s-1

    5) I said water is 0 order because not in rate equation along the lines?
    can u plz write all the questions frm wat i have seen i think from those questions u have posted i wud hav got abt 40 marks
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    What values did other people use to work out the rate of the reaction at t=40 seconds?

    I know I read off the co-ordinates where the tangent went through the x and y axes but I can't remember what they were and it's starting to freak me out
 
 
 
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