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    Does anyone know what the average Titration for the chemistry isa and if anyone's done it yet.


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    (Original post by Marwa Fahad)
    Does anyone know what the average Titration for the chemistry isa and if anyone's done it yet.


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    It differs from school to school. It probably also differs class to class because teachers change concentrations

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    (Original post by Marwa Fahad)
    Does anyone know what the average Titration for the chemistry isa and if anyone's done it yet.


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    What do you mean by 'average titration'?
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    (Original post by l1lvink)
    What do you mean by 'average titration'?
    Average titre probably, the average you work out from concordant results.

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    (Original post by Dylann)
    Average titre probably, the average you work out from concordant results.

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    That was my guess too, although that isn't really a result that matters in your ISA (obviously it does matter inside your school, but from school to school this will vary).
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    (Original post by Dylann)
    Yeah that makes sense. I think if you compare the thermodynamic properties as you said, it could suggest cyclohexane is more stable, since cyclohexane has a enthalpy of formation of about -170 and benzene has +50. Though this doesn't necessarily indicate stability as the part you quoted talks about overlapping of orbitals which is actually more to do with stability than enthalpies.
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    What that is showing is cyclohexene, but what they were asking was about cyclohexane.. It threw me off too.
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    (Original post by l1lvink)
    What that is showing is cyclohexene, but what they were asking was about cyclohexane.. It threw me off too.
    No. It is cyclohexane at the bottom left, showing cyclohexane is lower in energy than benzene.
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    (Original post by langlitz)
    No. It is cyclohexane at the bottom left, showing cyclohexane is lower in energy than benzene.
    Ah yes, sorry I missed that bit. In only saw the alkenes.
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    Hello, there I'm in Cambridge Board. Doing A levels Chemistry here!!
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    (Original post by noshahmad)
    Sure
    So I just had a mock exam and got an E, at the end of this year I need a high A, is that possible? If so how ? I feel so stressed and keep imagining myself failing. God forbid
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    (Original post by kira1)
    So I just had a mock exam and got an E, at the end of this year I need a high A, is that possible? If so how ? I feel so stressed and keep imagining myself failing. God forbid


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    Its possible., just work really hard, I'm in your boat too😃.
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    (Original post by Kadak)
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    Its possible., just work really hard, I'm in your boat too😃.
    Thanks
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    (Original post by kira1)
    So I just had a mock exam and got an E, at the end of this year I need a high A, is that possible? If so how ? I feel so stressed and keep imagining myself failing. God forbid
    DEFINITELY! never fear lol i am a student on a gap year (unconditional and conditional offers in biomedical science from Bristol,Manchester,Herts) and i was in the same situation,but i bumped up to an A in f322 in my first year. Just resitting f321 as i keep getting B/C no idea why lol....well actually my silly mistakes keep accumulating My advice is flash cards,posters and plenty of past-papers! Good luck. Btw anyone stuck feel free to ask me about any bio,maths or chem questions in my inbox
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    (Original post by shakeyboy)
    DEFINITELY! never fear lol i am a student on a gap year (unconditional and conditional offers in biomedical science from Bristol,Manchester,Herts) and i was in the same situation,but i bumped up to an A in f322 in my first year. Just resitting f321 as i keep getting B/C no idea why lol....well actually my silly mistakes keep accumulating My advice is flash cards,posters and plenty of past-papers! Good luck. Btw anyone stuck feel free to ask me about any bio,maths or chem questions in my inbox
    Thank you so much
    Just went by my biology teacher she told me that she doesn't think I'll be getting a C let alone an A
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    Anyone here who can answer a AS Chem question to do with Energetics pls
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    (Original post by kira1)
    So I just had a mock exam and got an E, at the end of this year I need a high A, is that possible? If so how ? I feel so stressed and keep imagining myself failing. God forbid
    I got a D in my mocks and 90% im my final exams. It's defo possible, as long as you put the work in and learn from your mistakes (examiner reports are good for this)
    PM if you want actual advice haha.

    Edit: my teacher also told me that I wouldn't get above a C in Chen. Belieeeeeve in yourself and work hard you'll be fine 😎
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    (Original post by Coerce)
    Anyone here who can answer a AS Chem question to do with Energetics pls
    Yeah what's the question?


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    (Original post by cerlohee)
    Yeah what's the question?


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    Working out Enthaplhy chance of combustion;;

    0.74 g (0.010 mol) of propanoic acid was burned in the simple calorimeter like that described above for the combustion of methanol. The temperature rose by 8.0 K. What value does this give for the enthalpy change of combustion of propanoic acid?

    I understand that the equation to use is q =m x c x temp change so it'd be 0.74? 4.2 x 8
    This from where I get stuck - also I believe the mass I'm inputting to be wrong

    I have another question too

    50.0cm^3 of 2.00cm moldom^-3 sodium hydroxide and 50.0cm^3 of 2.00 moldm^-3 hydrochloric acid were mixed in an expanded ploysterent beaker , temp rising by 11.0k

    so it'd be 100 x 4.2 x 11 = 4620 - I had a nosey at the back and its -46.2 kj
    do I get this value by working out moles mxv/100 which would be; 2 x 50/1000 which equals 0.1
    thus 4620/0.1 = 46200 = 46.2kjmol

    Sorry for the essay but I have an exam tommorow and want to be through
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    Hello people, I'm doing Edexcel AS Chem
 
 
 
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