Notices
Results 1 to 15 of 15

Thread: redox reactions

  1. #1 redox reactions 
    Forum Freshman
    Join Date
    Jan 2010
    Posts
    79
    Could any one please teach me how to balance redox reactions by both oxidation and ion electron methods. Or please suggest a website which has clear explanations for this.


    Thanx for ur help


    Reply With Quote  
     

  2.  
     

  3. #2  
    Forum Freshman Samuel P's Avatar
    Join Date
    Oct 2008
    Location
    England
    Posts
    78
    Ahhh god, I just typed out a big response with explanations and deleted it. I'll just give you some sites instead.

    This one pretty much explains it all, because the addition of one electron is pretty much the same as adding an element with a negative charged ion. (e- = I-) in terms of addition of electrons. How they will react, as I is an element makes it a little different though and you have to work out basic bonds that are formed, or if any bonds are formed at all. :P

    http://www.shodor.org/unchem/advanced/redox/index.html

    Just remember, as electrons are negative, if you gain one, you lose one charge, if you lose one you gain one charge.

    2Ag+ + 2e- ----> 2Ag

    ^_^


    Reply With Quote  
     

  4. #3  
    Forum Freshman Samuel P's Avatar
    Join Date
    Oct 2008
    Location
    England
    Posts
    78
    Oops, sorry I forgot you should probably add state symbols too!

    Ag+ (aq) (Ag + has one less electron than usual in its outer shell)

    Ag (s) (Ag with no charge has just the right amount, as it appears in the periodic table)

    Just because something has no charge though, doesn't mean it's unable to react.
    Hope I helped )
    Reply With Quote  
     

  5. #4  
    Forum Freshman
    Join Date
    Jan 2010
    Posts
    79
    You really did help. Thanks Samuel P!!!
    Thanks a lot!!!!
    Reply With Quote  
     

  6. #5  
    Forum Freshman Samuel P's Avatar
    Join Date
    Oct 2008
    Location
    England
    Posts
    78
    You're very welcome ^_^!
    Reply With Quote  
     

  7. #6  
    Forum Freshman
    Join Date
    Jan 2010
    Posts
    79
    Hey I got another problem here. I aint able to solve this sum!
    Balance the redox reaction
    Mg + HNO3 --> Mg(NO3) + N2O + H2O
    ____________________2_________
    Would be glad if you gave the whole procedure.
    Reply With Quote  
     

  8. #7  
    Reptile Dysfunction drowsy turtle's Avatar
    Join Date
    Mar 2009
    Location
    UK
    Posts
    2,256


    This is what I'd expect.
    "The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at or repair." ~ Douglas Adams
    Reply With Quote  
     

  9. #8  
    Forum Freshman
    Join Date
    Jan 2010
    Posts
    79
    Hey man drowsy turtle where did you skip the H2O in the reaction. The reaction is
    Mg + HNO3 --> Mg(NO3) + N2O + H2O
    ____________________2_________
    not H2

    So now what. How do you balance it?
    Reply With Quote  
     

  10. #9  
    Reptile Dysfunction drowsy turtle's Avatar
    Join Date
    Mar 2009
    Location
    UK
    Posts
    2,256
    Well, that's just my point; firstly, I wouldn't expect that to be the correct reaction, and secondly I don't think it can be balanced as it is.
    "The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at or repair." ~ Douglas Adams
    Reply With Quote  
     

  11. #10  
    JGK
    JGK is offline
    Forum Freshman JGK's Avatar
    Join Date
    Jan 2010
    Posts
    27
    "Therapy is expensive. Popping bubble wrap is cheap. You choose."
    Reply With Quote  
     

  12. #11  
    Forum Masters Degree organic god's Avatar
    Join Date
    Feb 2008
    Location
    London
    Posts
    567
    i dont know how you are getting N2O in that reaction

    Edit - or H20

    acid + metal = salt + H2
    everything is mathematical.
    Reply With Quote  
     

  13. #12  
    Forum Freshman
    Join Date
    Jan 2010
    Posts
    12
    Redox reaction is the most important chapter of chemistry. I did this chapter from here.
    http://www.tcyonline.com/india/testC...egoryID/100577
    Reply With Quote  
     

  14. #13  
    Forum Freshman
    Join Date
    Jan 2010
    Posts
    79
    The Reaction Is All Right
    well I know the answer but i aint know how i got it. There must be a way to balance it

    This is the answer:

    4Mg + 10HNO3 --> 4Mg(NO3)2 + N2O + 5H2O


    But i dont know how to get it. Please Help!!
    Reply With Quote  
     

  15. #14 Re: redox reactions 
    Forum Freshman
    Join Date
    Mar 2010
    Location
    South Africa
    Posts
    7
    Please follow this simple step in other to ballance any redox reaction.

    1. If the reaction is in acid medium you have to H+ or H2O to etheir side
    2. separate the reactions into oxidation and reduction half cells and balance each separately.
    3. Then balance the ATOM fist before balanceing the charges.
    4. Combine the half cell afterwards.
    Reply With Quote  
     

  16. #15  
    Forum Freshman
    Join Date
    Mar 2010
    Location
    South Africa
    Posts
    7
    Quote Originally Posted by kakarot
    The Reaction Is All Right
    well I know the answer but i aint know how i got it. There must be a way to balance it

    This is the answer:

    4Mg + 10HNO3 --> 4Mg(NO3)2 + N2O + 5H2O


    But i dont know how to get it. Please Help!!
    This is the detailed steps on how to balance this example of redox reaction.

    1. Its obvious the reaction is in the acidic meddium because of HNO3 so i can add water of H+ to balance it.
    2. Separating the reaction into two half cells

    Mg-----------> Mg+2 (oxidation half cell)

    N03- ---------. N20 (Reduction half cell)

    balancing the half cell separatly:
    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
  •