2 299678 Mar 18, 2010 #1 Q1. CN- + OH- ---> CNO- + H2O + e- Q2. MnO4- + I- + H2O -----> MnO2 + IO3- + OH- Could you balance the above reaction? Members don't see this ad.
Q1. CN- + OH- ---> CNO- + H2O + e- Q2. MnO4- + I- + H2O -----> MnO2 + IO3- + OH- Could you balance the above reaction? Members don't see this ad.
S sfoksn Full Member 15+ Year Member Joined Sep 4, 2006 Messages 761 Reaction score 1 Mar 20, 2010 #2 For the second one, I think it's just a redox rxn. so you got MnO4- -> MnO2, so if you balance that half rxn, it would be 3e- + 4H+ + MnO4- -> MnO2 + 2H2O you do same for the I- -> IO3-, 3H2O + I- -> IO3- + 6H+ + 6e-. Then you multiple the MnO4 half rxn coefficients by 2, to match up the 6 e's from the other half rxn. Then add them up, to get 2H+ + I- + 2MnO4- -> IO3- + 2MnO2 + H2O. May have done something wrong as I was doing it on the computer w/o writing them out, but the idea should be good Upvote 0 Downvote
For the second one, I think it's just a redox rxn. so you got MnO4- -> MnO2, so if you balance that half rxn, it would be 3e- + 4H+ + MnO4- -> MnO2 + 2H2O you do same for the I- -> IO3-, 3H2O + I- -> IO3- + 6H+ + 6e-. Then you multiple the MnO4 half rxn coefficients by 2, to match up the 6 e's from the other half rxn. Then add them up, to get 2H+ + I- + 2MnO4- -> IO3- + 2MnO2 + H2O. May have done something wrong as I was doing it on the computer w/o writing them out, but the idea should be good
S sfoksn Full Member 15+ Year Member Joined Sep 4, 2006 Messages 761 Reaction score 1 Mar 20, 2010 #3 Oh, and you do the same for the first equation. CN- -> CNO-, and OH- -> H2O. If you balance them, you shoudl get 2H+ + 2OH- + CN- -> H2O + CNO- Please let me know if this is the right way to approach the problem. Thanks for posting good problems, kpark Upvote 0 Downvote
Oh, and you do the same for the first equation. CN- -> CNO-, and OH- -> H2O. If you balance them, you shoudl get 2H+ + 2OH- + CN- -> H2O + CNO- Please let me know if this is the right way to approach the problem. Thanks for posting good problems, kpark