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

Confused about this percentage yeild calculation. Watch

    • Thread Starter
    Offline

    0
    ReputationRep:
    I did an expertiment, where I recrystalised an isomer from a the filtrate of another isomer, and I need to calculate the % yeild.

    I think the balanced eq is:

    [l-Co(en)3]3+ + 3NaI + H2O + tartrate = [l-Co(en)3]I3.H2O + 3Natart

    We also added some conc. ammonia, but I'm not sure what the role of that was.

    Anyway, since the l-Co(en)3]3+ was in a filtrate, I don't know how many grams were added. Do I use the NaI instead, or is there a trick I'm missing?
    Offline

    8
    ReputationRep:
    (Original post by fudgestix)
    I did an expertiment, where I recrystalised an isomer from a the filtrate of another isomer, and I need to calculate the % yeild.

    I think the balanced eq is:

    [l-Co(en)3]3+ + 3NaI + H2O + tartrate = [l-Co(en)3]I3.H2O + 3Natart

    We also added some conc. ammonia, but I'm not sure what the role of that was.

    Anyway, since the l-Co(en)3]3+ was in a filtrate, I don't know how many grams were added. Do I use the NaI instead, or is there a trick I'm missing?
    Did you have tartaric acid, in which case you might neutralise with ammonia?

    You certainly could calculate a yield based on iodide and, indeed, unless you can get at the starting quantity of Co complex somehow, I don't see any other way of doing the calculation.
 
 
 
  • 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.