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

    0
    ReputationRep:
    Hi I need help with these type of calculations as I find them really confusing. its pretty long but if you do get the answer could you leave how you worked it out please. cheers

    Compound A is an organic base. A student analysed this base by the procedure below. He first prepared a solution of A by dissolving 4.32g of A in water and making the solution up to 250cm3. The student then carried out a titration in which 25.00cm3 of this solution of A were neutralised by exactly 23.20cm3 of 0.200 HCl.
    1 mole of A reacts completely with 1 mole of HCl.
    Use this information to calculate this molar mass of base A and suggest its identity.

    Thanks!!
    • Community Assistant
    • Study Helper
    Offline

    14
    ReputationRep:
    (Original post by CaseySD)
    Hi I need help with these type of calculations as I find them really confusing. its pretty long but if you do get the answer could you leave how you worked it out please. cheers

    Compound A is an organic base. A student analysed this base by the procedure below. He first prepared a solution of A by dissolving 4.32g of A in water and making the solution up to 250cm3. The student then carried out a titration in which 25.00cm3 of this solution of A were neutralised by exactly 23.20cm3 of 0.200 HCl.
    1 mole of A reacts completely with 1 mole of HCl.
    Use this information to calculate this molar mass of base A and suggest its identity.

    Thanks!!
    When faced with this sort of question you must work backwards from the information which alllows you to determine the actual amount of one of the components. (highlighted)
    • Thread Starter
    Offline

    0
    ReputationRep:
    (Original post by charco)
    When faced with this sort of question you must work backwards from the information which alllows you to determine the actual amount of one of the components. (highlighted)
    Alright thanks for the hint.. I guess ill give it another go
    Offline

    13
    ReputationRep:
    (Original post by CaseySD)
    Alright thanks for the hint.. I guess ill give it another go
    Hey,

    i'm stuck on a similar thing, i think i got the answer as 93.1. Is that right?
    • Community Assistant
    • Study Helper
    Offline

    14
    ReputationRep:
    (Original post by gozatron)
    Hey,

    i'm stuck on a similar thing, i think i got the answer as 93.1. Is that right?

    ... is the correct answer....
 
 
 
  • 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
    What newspaper do you read/prefer?
  • 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.