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

    2
    ReputationRep:
    Why cant you do titration directly to find amount of coppee ions. Why do you have to add the iodide and find amount of iodine etc.???
    Offline

    9
    ReputationRep:
    (Original post by Razorr4)
    Why cant you do titration directly to find amount of coppee ions. Why do you have to add the iodide and find amount of iodine etc.???
    It's because of the difficulty in finding something to titrate copper with that is specific to copper. The usual titrant for transition metal ion titrations is EDTA, but this will also react with any other transition metal ions present (e.g. an impurity of nickel or iron) giving a false titration value.

    The oxidation of iodide ions by Cu2+ is more specific to copper. Hence adding excess iodide, and titrating the iodine formed is usually a more accurate way of determining Cu2+ concentration.
 
 
 
  • 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
    Did TEF Bronze Award affect your UCAS choices?
  • 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

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