Notices
Results 1 to 5 of 5

Thread: redox equation

  1. #1 redox equation 
    Forum Freshman
    Join Date
    Aug 2006
    Posts
    23
    I'm kind of self studying for this topic so i need some help.

    Write a fully balanced redox equation for the reaction that occurs when sulfur dioxide gas is bubbled through an acidified solution of potassium permanganate.

    The book has this answer:
    (2MnO4 -) + (5SO2) + (2H2O) + (6H +) = (5SO4 2-) + (2Mn 2+)

    I got this answer:
    (2MnO4 -) + (5SO2) + (2H2O) = (5SO4 2-) + (4H +) + (2Mn 2+)

    I didn't bother typing the working as it gets tedious. I just want to know which answer is correct.


    Reply With Quote  
     

  2.  
     

  3. #2 Re: redox equation 
    Forum Ph.D.
    Join Date
    Apr 2007
    Location
    "Jamerica"...When in America, Florida; when in Jamaica, St. Mary
    Posts
    959
    Quote Originally Posted by chocolate123
    I'm kind of self studying for this topic so i need some help.

    Write a fully balanced redox equation for the reaction that occurs when sulfur dioxide gas is bubbled through an acidified solution of potassium permanganate.

    The book has this answer:
    (2MnO4 -) + (5SO2) + (2H2O) + (6H +) = (5SO4 2-) + (2Mn 2+)

    I got this answer:
    (2MnO4 -) + (5SO2) + (2H2O) = (5SO4 2-) + (4H +) + (2Mn 2+)

    I didn't bother typing the working as it gets tedious. I just want to know which answer is correct.
    Your answer seems to be correct.

    There are 2 problems with the book answer:
    1. The charges aren't balanced.
    2. The H+'s are on the wrong side; this makes the equation unbalanced (there is no Hydrogen on the right).

    Edit: Isn't school out? Or are you preparing for AP Chem next year?


    Whence comes this logic: no evidence = false?

    http://www.atheistthinktank.net/thinktank/index.php

    Theists welcome.
    ___________
    Reply With Quote  
     

  4. #3  
    Forum Freshman
    Join Date
    Aug 2006
    Posts
    23
    Ok thanks.
    We will learn redox a bit later on in the year at school. But because my chemistry teacher is new - has never taught chemistry or any high school students before, I don't think I can rely on him completely, so i just decided to study a little myself.
    Reply With Quote  
     

  5. #4  
    Forum Freshman
    Join Date
    May 2007
    Location
    Somewhere in and or around a Sn1 reaction
    Posts
    9
    arnt your charges unbalanced also?
    To Whom this may concern.
    This message will waste your time.
    So stop reading it
    Will
    Reply With Quote  
     

  6. #5  
    Forum Freshman César's Avatar
    Join Date
    Sep 2006
    Location
    Spain, Europe
    Posts
    61
    I think the right answer could be:

    5SO2 + 2MnO4(-) <-> 5S04(2-) + 2Mn(2+) + 4H(+)

    or, if you prefer it complete,

    5S02 + H2O + 2 KMnO4 <-> K2SO4 + 2H2SO4 + 2MnSO4

    Best regards,

    César
    Reply With Quote  
     

Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •