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

Chem PAG 1.1 Determination of composition of copper (II) carbonate Watch

    • Thread Starter
    Offline

    2
    ReputationRep:
    Any help on this question?

    On the extension question 4 it asks to explain why it is not necessary to calculate he percentage uncertainty in the volume of H2SO4 (aq) used.
    Offline

    9
    ReputationRep:
    (Original post by edwards.shan)
    Any help on this question?

    On the extension question 4 it asks to explain why it is not necessary to calculate he percentage uncertainty in the volume of H2SO4 (aq) used.
    Without knowing the full question it is impossible to answer your question with certainty.

    One possibility: did you use an excess of sulphuric acid in the experiment?
    Offline

    17
    ReputationRep:
    (Original post by TutorsChemistry)
    One possibility: did you use an excess of sulphuric acid in the experiment?
    Bingo.
    • Thread Starter
    Offline

    2
    ReputationRep:
    (Original post by TutorsChemistry)
    Without knowing the full question it is impossible to answer your question with certainty.

    One possibility: did you use an excess of sulphuric acid in the experiment?
    The reaction was
    CuCO3•Cu(OH)2 + 2H2SO4 —> 2CuSO4 + 3H2O + CO2
    Offline

    9
    ReputationRep:
    (Original post by edwards.shan)
    The reaction was
    CuCO3•Cu(OH)2 + 2H2SO4 —> 2CuSO4 + 3H2O + CO2
    Great

    Whether you used excess sulfuric acid depends on the amount you added in your experiment. How much did you add, and how accurately? Did you just add until there was no more effervescence?
 
 
 
  • 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.