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

I don't understand a question Watch

Announcements
    • Thread Starter
    Offline

    1
    ReputationRep:
    9701_w11_qp_11
    Sulfur dioxide is used as a preservative in wine making.The following equations describe how sulfur dioxide dissolves.H2O + SO2 HSO3– + H+HSO3– + H+ SO32– + 2H+Which statement about these two reactions is correct?

    A HSO3– acts as a base.B SO2 acts as an oxidising agent.C SO32– acts as an acid.D SO32– acts as a reducing agent.

    Answer is A, why?

    Thank you!
    Offline

    16
    ReputationRep:
    With your unfortunately terrible layout, it is hard to say, but...

    There is no change in oxidation state at any stage, so B and D can't be right.
    C can't be correct as SO32- doesn't contain H+, so how could it act as an acid (Shut it Gilbert!)
    So that leaves A, which must be right. Not that it appears to be accepting H+, but at least it can.
    Offline

    3
    ReputationRep:
    (Original post by Deathlotus)
    9701_w11_qp_11
    Sulfur dioxide is used as a preservative in wine making.The following equations describe how sulfur dioxide dissolves.H2O + SO2 HSO3– + H+HSO3– + H+ SO32– + 2H+Which statement about these two reactions is correct?

    A HSO3– acts as a base.B SO2 acts as an oxidising agent.C SO32– acts as an acid.D SO32– acts as a reducing agent.

    Answer is A, why?

    Thank you!
    is this an elimination reaction?
    • Community Assistant
    • Study Helper
    Offline

    14
    ReputationRep:
    (Original post by thefatone)
    is this an elimination reaction?
    Only in that it eliminates nasty bugs from glassware used for wine-making ...
 
 
 
  • 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
    Break up or unrequited love?
  • 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.