Results are out! Find what you need...fast. Get quick advice or join the chat
Hey! Sign in to get help with your study questionsNew here? Join for free to post

pH of complex ions

Announcements Posted on
    • Thread Starter
    • 0 followers
    Offline

    ReputationRep:
    Hey guys, stuck on q.17(b)(ii) on this paper:

    http://www.edexcel.com/migrationdocu...e_20110131.pdf

    Only difference between the 2 I note is their charges, but how does this affect pH? Can't seem to understand this...any ideas?

    Cheers!
    • 47 followers
    Offline

    ReputationRep:
    The acidity of some complexes is caused by the high charge density of the metal ion. So compare the charge density of Cr3+ with Cu2+ :yep:
    • Thread Starter
    • 0 followers
    Offline

    ReputationRep:
    (Original post by EierVonSatan)
    The acidity of some complexes is caused by the high charge density of the metal ion. So compare the charge density of Cr3+ with Cu2+ :yep:
    Cr3+ has the greater charge density of the 2, though how does Charge density affect pH? :eek:
    • 47 followers
    Offline

    ReputationRep:
    (Original post by Next Level)
    Cr3+ has the greater charge density of the 2, though how does Charge density affect pH? :eek:
    Ah, well that's why you're struggeling :p:

    You need to look up 'acidity of aqua-complexes' this will do:

    http://www.chemguide.co.uk/inorganic...s/acidity.html
    • Thread Starter
    • 0 followers
    Offline

    ReputationRep:
    (Original post by EierVonSatan)
    Ah, well that's why you're struggeling :p:

    You need to look up 'acidity of aqua-complexes' this will do:

    http://www.chemguide.co.uk/inorganic...s/acidity.html
    Got it, easy peasy eh? I bet you are chemguide haha
    • 47 followers
    Offline

    ReputationRep:
    (Original post by Next Level)
    Got it, easy peasy eh? I bet you are chemguide haha
    Nothing to do with me :nah:
    • Thread Starter
    • 0 followers
    Offline

    ReputationRep:
    (Original post by EierVonSatan)
    Nothing to do with me :nah:
    Haha well you certainly are as clever

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?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  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 to join now Processing…

Updated: June 9, 2012
New on TSR

The future of apprenticeships

Join the discussion in the apprenticeships hub!

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