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

    2
    ReputationRep:
    (Original post by HFancy1997)
    Temp was 298K you get negative 43 or something so its feasible as delta g is neg

    Posted from TSR Mobile
    How did you work out delta G, I dont remember them giving the entropy change?
    Offline

    2
    ReputationRep:
    (Original post by Jm098)
    O10 as there was oxygen in the water
    What was this question?

    Posted from TSR Mobile
    Offline

    3
    ReputationRep:
    (Original post by SazahSauce)
    It was the same shape as water, i swear thats non-linear or bent shaped
    180 degree
    Offline

    15
    ReputationRep:
    (Original post by cr7alwayz)
    How did you work out delta G, I dont remember them giving the entropy change?
    They gave entropy change and you had enthalpy change of solution. The entropy change was 0.22 something (I think)?

    I got -43 roughly.
    Offline

    1
    ReputationRep:
    To put 2+ charge on the empirical formula, I put square brackets around it. Is that okay?
    Offline

    13
    ReputationRep:
    (Original post by medstudent1010)
    Your method is right however your conclusion is wrong 9.4x10^-7 >1x10^-7 hence solution is alkali
    yeah realised this, pretty annoying cos do a level maths but have decided that 9x < x nice one me
    Offline

    7
    ReputationRep:
    My bad yes it was CuO10H4C4 2-, I remember counting the Os in water

    Posted from TSR Mobile
    Offline

    15
    ReputationRep:
    (Original post by avocadomash)
    To put 2+ charge on the empirical formula, I put square brackets around it. Is that okay?
    I think it's -2? You're making me doubt myself now aha.
    Offline

    2
    ReputationRep:
    (Original post by ImNervous)
    What was this question?

    Posted from TSR Mobile
    work out the empirical formula one, it was Cu with two ethandioate ligands and two h20 ligands
    Offline

    2
    ReputationRep:
    (Original post by BioStudentx)
    I think it's -2? You're making me doubt myself now aha.
    yeah 2-
    Offline

    3
    ReputationRep:
    this is stupid now we need to have almost no careless mistakes to get a*
    Offline

    13
    ReputationRep:
    (Original post by maisym00)
    Pretty sure the reagent was starch and the observation was blue/black to colourless. You can type it into YouTube and see the end point; and that's what happened
    yeah ya dun dun, did this practical in school so was a bit surprised seeing people put other stuff
    Offline

    1
    ReputationRep:
    (Original post by swopnil)
    Yeah, agree it was quite easy but stop being obtuse!
    Obtuse? Am i an angle fam?
    Offline

    2
    ReputationRep:
    (Original post by BioStudentx)
    I think it's -2? You're making me doubt myself now aha.
    It was 2- don't worry😊
    The ligand had a 2- charge and there were 2 of them bound to a Cu2+ ion
    Offline

    1
    ReputationRep:
    "you will never be asked to make multi-step reaction mechanisms that are more than two stages"

    k den
    Offline

    1
    ReputationRep:
    It was -2 because the group that was attached to it was -2 and there was two of them so +2-4 = -2. Well thats what i did anyways

    (Original post by BioStudentx)
    I think it's -2? You're making me doubt myself now aha.
    Offline

    13
    ReputationRep:
    (Original post by Brandoncarlin)
    I don't remember H+ being in the rate equation, only H2O2 and I-
    You do need 2 I- there was 2 I- in the overall equation...
    Offline

    1
    ReputationRep:
    (Original post by Brandoncarlin)
    I don't remember H+ being in the rate equation, only H2O2 and I-
    sorry my bad, the other I- was in the given equation
    Offline

    2
    ReputationRep:
    For the multi step reaction mechanism, did anyone else get 2 of the steps the same?

    H^+ + OH^- ---> H2O

    Spent about 5 minutes checking and everything cancelled to give the overall equation
    Offline

    11
    ReputationRep:
    (Original post by BioStudentx)
    They gave entropy change and you had enthalpy change of solution. The entropy change was 0.22 something (I think)?

    I got -43 roughly.
    Yeah, I converted KJ to J and got -43000.
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Has a teacher ever helped you cheat?
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • 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.