Turn on thread page Beta
    Offline

    2
    ReputationRep:
    yeh i got 2+..

    square planar and tetrahedral for the shapes
    Offline

    0
    ReputationRep:
    (Original post by MoMatrix)
    **** didn't divide ammonia by 2 so I got -199.How many marks would I lose.
    Did anyone get 298.3 K for the temperature and any less that that would not make it feasible.
    Probably 2/3 for the first part. But don't know about the follow up question. Will depend if they allow you to carry over a wrong answer
    Offline

    1
    ReputationRep:
    Trying to remember some answers.

    -99.5 for something to do with ammonia.
    possibly -38 or 39 or something for the bond one, cant remember
    temp = 298
    so at 800K the reaction was not feasible?

    mg = white flames, white solid
    s = blue flames, gas given off
    not sure on these?

    God ive forgotten half the questions already... did people agree with these though?
    Offline

    0
    ReputationRep:
    (Original post by MoMatrix)
    **** didn't divide ammonia by 2 so I got -199.How many marks would I lose.
    Did anyone get 298.3 K for the temperature and any less that that would not make it feasible.
    done the same. dont know how many marks i will loose.
    Offline

    1
    ReputationRep:
    (Original post by jimmy303)
    Octahedral shape yes and the C2O4(2-) form a square planar without the two waters yes because it said the waters were opposite each other.

    120 degrees because http://en.wikipedia.org/wiki/Oxalate the carbons are bonded to three things then its trigonal planar, so unless i misread the question (i thought it wanted the bond angle between carbon and the oxygen) then i think it's 120 degrees.

    If it asked for bond angles of the coordinate bonds with the metal ion then I'm wrong :P
    im sure it asked for o-cu-o bong angle, tho i may have misread the question.
    Offline

    2
    ReputationRep:
    yh i think the reaction wasn't feasible at 800k...cuz ^G was positive...
    Offline

    0
    ReputationRep:
    (Original post by magicalelf)
    Trying to remember some answers.

    -99.5 for something to do with ammonia.
    possibly -38 or 39 or something for the bond one, cant remember
    temp = 298
    so at 800K the reaction was not feasible?

    mg = white flames, white solid
    s = blue flames, gas given off
    not sure on these?

    God ive forgotten half the questions already... did people agree with these though?
    -99.5 was for working out delta S
    Would agree with all those answers you put
    Offline

    0
    ReputationRep:
    how many marks would i lose for not divinding the moles by 2
    Offline

    0
    ReputationRep:
    (Original post by magicalelf)
    im sure it asked for o-cu-o bong angle, tho i may have misread the question.
    Pretty certain it asked for O - Cu - O angle, which i said was 90
    Offline

    3
    ReputationRep:
    (Original post by jamest92)
    Pretty certain it asked for O - Cu - O angle, which i said was 90
    same.
    Offline

    1
    ReputationRep:
    (Original post by magicalelf)
    im sure it asked for o-cu-o bong angle, tho i may have misread the question.
    It's funny how these things become blurry in the exam lol. I'm pretty sure i misread it since I tend to gloss over the question. Ah well just one mark
    Offline

    0
    ReputationRep:
    (Original post by jimmy303)
    It had four ligands so tetrahedral or square planar i think.
    yey thats what i wrote
    Offline

    1
    ReputationRep:
    (Original post by jamest92)
    Pretty certain it asked for O - Cu - O angle, which i said was 90
    woop i got 90 too, thought id misread the question and lost a silly mark there.. thank god.

    i need to stop worrying over this exam and forgot it now since i can't change anything, physics on monday to worry about now :|
    Offline

    2
    ReputationRep:
    FREEDOM!!!

    Offline

    0
    ReputationRep:
    For the Cu with C2O42- complex, did people cut draw it with 2 lots of CrO42- and no water ligands? i think i saw on the question that you weren't supposed to draw the water ligands, but i cant remember now!
    Offline

    0
    ReputationRep:
    (Original post by jamest92)
    -99.5 was for working out delta S
    Would agree with all those answers you put
    yes i got all of those. execpt i forgot to put white solid for MgO dam. also did you put hydrogen fuel cell or standard hydrogen electrode for the emf one
    Offline

    0
    ReputationRep:
    Did people get -0.46 for the E value for the negative terminal?
    Offline

    3
    ReputationRep:
    Not wanting to gloat but I think I'd need a good C to get an A overall. How many raw marks do you think I'd need?
    Offline

    0
    ReputationRep:
    what did people get as the percentage of iron? 8.74 or something ?
    Offline

    0
    ReputationRep:
    (Original post by Betsss)
    Did people get -0.46 for the E value for the negative terminal?
    Yes and in the CGP book it has the exact example but with their cell as 2.05V, and their answers -0.36. Ours was 2.15V so can be sure -0.46V is right
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: August 20, 2011
The home of Results and Clearing

1,211

people online now

1,567,000

students helped last year

University open days

  1. University of Buckingham
    Postgraduate Open Evening Postgraduate
    Thu, 23 Aug '18
  2. University of Glasgow
    All Subjects Undergraduate
    Tue, 28 Aug '18
  3. University of Aberdeen
    Undergraduate Open Day Undergraduate
    Tue, 28 Aug '18
Poll
How are you feeling about GCSE results day?

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.