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

    15
    ReputationRep:
    Iron is extracted by heating iron oxide with carbon monoxide.

    Fe2 O3 + 3CO -----> 2Fe + 3CO2

    a) Calculate the theoretical yield of iron that can be obtained when 320kg of iron oxide (Fe2 O3) reacts with excess carbon monoxide.

    b) The actual yield of iron is 100kg. Calculate the percentage yield of iron.

    This is really hard and not straight forward, I have got an answer that I have worked out, but not sure if it's right, could a really good chemist student work it out and see what you got? My answers are in the spoilers. Thanks!!

    Spoiler:
    Show

    a) 146.9kg
    b) 68.1%
    • Official TSR Representative
    Offline

    15
    ReputationRep:
    Sorry you've not had any responses about this. Are you sure you've posted in the right place? Here's a link to our subject forum which should help get you more responses if you post there.
    Offline

    3
    ReputationRep:
    I got a different set of answers to you. This was my method:moles= mass / molecular mass so the number of moles of Fe2O3 is:320000g / 159.6 gmol-1 = 2005 molThen the ratio is 1:2 between the Fe2O3 and the Fe so you get 4010 mol of Fe. To get the mass you do 4010 x 55.8 = 223758g = 223.758kgWith this answer the percentage yield is 44.7%.
 
 
 
  • 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.