Hey there! Sign in to join this conversationNew here? Join for free
x Turn on thread page Beta
    • Thread Starter
    Offline

    0
    ReputationRep:
    so i had a question to work out the empirical formula of a 'F'. the answer i got was Cu2SO6H2

    the next part of the question says: when F is dissolved in dil hcl, the resulting blue solution gives a white ppt with barium chloride solution.
    suggest a formula for F, given that all the hydrogen is present in hydroxide ions.

    i have no idea where to start! help!
    • Community Assistant
    • Study Helper
    Offline

    17
    ReputationRep:
    Community Assistant
    Study Helper
    (Original post by Jack_wills)
    so i had a question to work out the empirical formula of a 'F'. the answer i got was Cu2SO6H2

    the next part of the question says: when F is dissolved in dil hcl, the resulting blue solution gives a white ppt with barium chloride solution.
    suggest a formula for F, given that all the hydrogen is present in hydroxide ions.

    i have no idea where to start! help!
    Well, which ions give a white ppt with Ba2+(aq)?

    You are also told that there are two OH groups ...

    Doesn't leave a lot!
    Offline

    1
    ReputationRep:
    The answer is Oxygen. :holmes:
    • Thread Starter
    Offline

    0
    ReputationRep:
    sulphate ions?

    how is it oxygen?

    ahhh so confused!
    • Thread Starter
    Offline

    0
    ReputationRep:
    ok so so4 is removed which leaves Cu2O2H2 but the H is only present as 0H- so the O2 and H2 form 2OH- leaving Cu2?

    or am i completely doing this wrong?
    • Thread Starter
    Offline

    0
    ReputationRep:
    ive worked it out dont worry
    Offline

    11
    ReputationRep:
    (Original post by Jack_wills)
    sulphate ions?

    how is it oxygen?

    ahhh so confused!
    it is sulphate. the remaining bits of your empirical formula should be quite obvious, since you have transition metals in aqueous solution
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: March 26, 2011
Poll
Do you agree with the proposed ban on plastic straws and cotton buds?

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

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