Chemistry Help... Balancing Equations

Discussion in 'Random Ramblings' started by animalsRawesome, Nov 2, 2012.

  1. animalsRawesome

    animalsRawesome Chillin' With My Peeps

    887
    7
    128
    Apr 12, 2011
    I am trying to to balance the following reaction by oxidation number method

    NaI + H2SO4 -----> Na2SO4 + I2 + H2S +H2O

    I split it into two half reactions...

    I multiplied the NaI by 2 bc there were two I on the other side; they gave up 2e-

    the H2SO4 and H2S gained 5e-

    I multiplied by 5 and 2 respectively in order to balance the electrons.

    I can't get the equation to balance though! Everything works out except I can't get the H and O to balance! Thanks for any help! [​IMG]
     
  2. Y N dottes

    Y N dottes Chillin' With My Peeps

    1,122
    42
    143
    Sep 1, 2012
    South Central WI
    im no chem master, but isnt it NaI + H2SO4 -----> Na2SO4 + HI.
    i mean, if its a double displacement reaction, the elements/compounds would just exchange partners, right?
    if i'm right, u could balance it by putting a 2 before NaI and a 2 before HI.......again, im no master at this
     
  3. animalsRawesome

    animalsRawesome Chillin' With My Peeps

    887
    7
    128
    Apr 12, 2011
    Well, the equation was given, so I guess it is not a double replacement reaction... Thank you for trying to help. I think I have been working on these darn problems for too long. Maybe in the morning I will look at it and be like, "oh, yeah! duh, that's how you do it..." LOL
     
  4. Y N dottes

    Y N dottes Chillin' With My Peeps

    1,122
    42
    143
    Sep 1, 2012
    South Central WI
    i see, thats how it was given....well, its got me stumped. sometimes i feel the same way after ive been working on the same type of problems for a while......got to give the brain a rest, lol. Plus its friday...
     
  5. mom'sfolly

    mom'sfolly Overrun With Chickens

    5,024
    66
    308
    Feb 15, 2007
    Austin area, Texas
    2NaI + 2 H2SO4 ----> Na2SO4 + H2S + 2 H2O

    It's been a very, very long time, but I think this works out. You get 2 sodium, 2 iodine, 2 hydrogen, 2 sulfur and 8 oxygen on both sides.

    If this is right, please let me know. It would make me happy if I could remember how to do this stuff.
     
    Last edited: Nov 2, 2012
  6. Deb B

    Deb B Chillin' With My Peeps

    272
    19
    98
    Jul 31, 2012
    Southern Maryland
    The equation above doesn'st balance. It's

    8 NaI + 5 H2SO4 = H2S + 4 I2 + 4 Na2SO4 + 4 H2O

    This gives 8 sodiums, 8 iodines, 10 hydrogens, 5 sulfurs, and 20 oxygens on both sides.
     
  7. Y N dottes

    Y N dottes Chillin' With My Peeps

    1,122
    42
    143
    Sep 1, 2012
    South Central WI
    ahh, there u go, that looks right on....
     

BackYard Chickens is proudly sponsored by