Hey there! Sign in to join this conversationNew here? Join for free
    Offline

    0
    ReputationRep:
    (Original post by Mikkels88)
    also, for testing Al203 ions, could you put react with NaOh to make NaAl(OH)4 and hten dissolve that in water, and the solution would conduct electricity and therefore contain ions?

    ridiculous question

    electrolysis with molten cryolite?
    Offline

    0
    ReputationRep:
    (Original post by strawberry_cake)
    How is everyone celebrating no exams?
    I have Physics :'(
    Offline

    0
    ReputationRep:
    (Original post by Zakir)
    SLEEEPPPPP...

    lol :P

    and just chilling out out now...wake up tomorrow morning having nothing to do - what a feeling!
    Sameeeeeeeee!! 13 years of school and now finally fully free for 3 months ;DI'm getting ready to sleep and it feels nice to not have an alarm on



    (Original post by mkb230)
    Getting wasted tonight with the rest of the sixth form but some of my mates have Physics on Monday
    Its feels good to have some tension free time now
    Offline

    2
    ReputationRep:
    (Original post by strawberry_cake)
    Sameeeeeeeee!! 13 years of school and now finally fully free for 3 months ;DI'm getting ready to sleep and it feels nice to not have an alarm on





    Its feels good to have some tension free time now
    Yeah month and a half of relaxation period before the much dreaded results day. I will be damned if I have to take a gap year.
    Offline

    0
    ReputationRep:
    (Original post by MoMatrix)
    Aluminium Oxide testing? Molten Cryolite, Electrolysis??
    I put this No idea if it's right though
    Offline

    0
    ReputationRep:
    (Original post by BethBeth)
    I put this No idea if it's right though
    i put this too!
    Offline

    1
    ReputationRep:
    I put electrolysis for the Al2O3 one... I thought I was mental for writing it actually, but now i'm slightly relieved
    Offline

    1
    ReputationRep:
    For Al2O3 I put test for electrical conductivity in the solid state, the test again for conductivity in the molten state. If it conducts in the latter but not in the former, then it is ionic. Somehow I bet that's only one/two though -_-
    Offline

    0
    ReputationRep:
    (Original post by mkb230)
    Yeah month and a half of relaxation period before the much dreaded results day. I will be damned if I have to take a gap year.
    Same..my bio5 couldnt have gone any worse.. i dont even want to think about how bad I've done
    Offline

    0
    ReputationRep:
    (Original post by strawberry_cake)
    How is everyone celebrating no exams?
    celebrating? still have one on monday :mad:
    Offline

    0
    ReputationRep:
    All those hours wasted learning ion colours... :mad2:
    On another note, it went okay i think

    FREEDOM!
    Offline

    0
    ReputationRep:
    (Original post by Silkielemon)
    Pretty sure you can just melt it and then it will conduct?
    didnt think of that....
    Offline

    15
    ReputationRep:
    LOL @ this exam...literally no colours except one XD Thought it was pretty good personally, though I messed up the mass percentage question and probably the bond angle one too.
    Offline

    0
    ReputationRep:
    Did anyone else find this exam really challenging? I thought Chem4 was good but I feel awful about this one. And I have to get an A.
    Offline

    1
    ReputationRep:
    (Original post by Scaudwell)
    I'm fairly sure it's just KNO3 (s) ---> K+(aq) + NO3-(aq)
    This. Seeing as it asked for enthalpy of solution (I think), which is when the ionic solid is dissolved in enough water so that its ions do not interect with eachother.
    Offline

    0
    ReputationRep:
    Was the boond angle 90?
    Offline

    0
    ReputationRep:
    (Original post by Zakir)
    yup i know...

    i think i invented some new reactions!! LOL..

    probz did get it wrong.

    but i think i got the second bit right, where is asked why the entrpoy was positive.

    what did you guys put?


    i put KNO3 (s) + (aq) ----> KNO3 (aq)


    think it was in the text book....what do you reckon?
    Offline

    0
    ReputationRep:
    for the enthalpy ones
    did you get something more positive than the -45 for the actual enthalpy
    and then because its a mean bond and diff environments give diff energies.
    Offline

    0
    ReputationRep:
    (Original post by artykid23)
    for the enthalpy ones
    did you get something more positive than the -45 for the actual enthalpy
    and then because its a mean bond and diff environments give diff energies.
    yes. pretty sure i got -30something. and i said because it is only an average which is taken over a range of compounds or something like that
    Offline

    0
    ReputationRep:
    (Original post by lou12)
    yes. pretty sure i got -30something. and i said because it is only an average which is taken over a range of compounds or something like that
    wooo nice and the the entropy just times the entropies by its coefficients
    and then -45 -(800x delta S/1000)? and then positive g so not feasible>
 
 
 
Poll
Do you agree with the PM's proposal to cut tuition fees for some courses?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.