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

Which statement is untrue

Announcements Posted on
    • Thread Starter
    • 3 followers
    Offline

    ReputationRep:
    Look at attachment:

    So lets go through them:

    A: the larger the log(Kc) the more positive the Kc value. Thus statement A is true

    B: e.d.t.a has a higher Kc value so will displace 1,2-diaminoethane

    C: this is just something we have to know. It is true

    D: this is also true as all others are either monodentate/hexadentatde. This is true.

    It would seem all answers are true. However, B is the answer. Why?
    Attached Thumbnails
    Click image for larger version. 

Name:	UntrueS.png 
Views:	24 
Size:	39.0 KB 
ID:	147019  
    • 4 followers
    Offline

    ReputationRep:
    (Original post by ilovemath)
    Look at attachment:

    So lets go through them:

    A: the larger the log(Kc) the more positive the Kc value. Thus statement A is true

    B: e.d.t.a has a higher Kc value so will displace 1,2-diaminoethane

    C: this is just something we have to know. It is true

    D: this is also true as all others are either monodentate/hexadentatde. This is true.

    It would seem all answers are true. However, B is the answer. Why?
    They have very similar Kc values which suggests the stability of the complexes in about the same so edta would be unlikely to displace 1,2-diaminoethane.
    • 48 followers
    Offline

    ReputationRep:
    What's bothering me is the en complex has only 1 ligand in that table...

    so is that K value for one ligand or is it a typo and there should be there ligands :shifty:
    • 4 followers
    Offline

    ReputationRep:
    (Original post by EierVonSatan)
    What's bothering me is the en complex has only 1 ligand in that table...

    so is that K value for one ligand or is it a typo and there should be there ligands :shifty:
    I didn't even see that. :teehee: I think it should be three as well.. maybe it's a typing error. :/
    • Thread Starter
    • 3 followers
    Offline

    ReputationRep:
    (Original post by EierVonSatan)
    What's bothering me is the en complex has only 1 ligand in that table...

    so is that K value for one ligand or is it a typo and there should be there ligands :shifty:
    typo probs
    • Thread Starter
    • 3 followers
    Offline

    ReputationRep:
    (Original post by NutterFrutter)
    They have very similar Kc values which suggests the stability of the complexes in about the same so edta would be unlikely to displace 1,2-diaminoethane.
    but it could...any way it was not a real exam so I shouldn't worry to much
    • 0 followers
    Offline

    ReputationRep:
    this statement is untrue

Reply

Submit reply

Register

Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?

    this is what you'll be called on TSR

  2. this can't be left blank
    this email is already registered. Forgotten your password?

    never shared and never spammed

  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. By joining you agree to our Ts and Cs, privacy policy and site rules

  2. Slide the button to the right to create your account

    Slide to join now Processing…

Updated: May 11, 2012
New on TSR

Moving on from GCSEs

What advice would you give someone starting A-levels?

Article updates
Reputation gems:
You get these gems as you gain rep from other members for making good contributions and giving helpful advice.