ScienceHideout
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Balancing A Redox...
Can someone go thru step-by-step?
MnO4[-] + CH3OH ---> Mn[2+] + HCO2H
My girlfriend wants me to explain this and I suck at explaining redox balancing and those half eqtns and acid mediums... Maybe she would get it if you
guys could explain...
hey, if you are reading this, I can't U2U, but you are always welcome to send me an email!
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hkparker
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Are we in acidic conditions?
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"Nothing is too wonderful to be true if it be consistent with the laws of nature." -Michael Faraday
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ScienceHideout
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Yes we are!
hey, if you are reading this, I can't U2U, but you are always welcome to send me an email!
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hkparker
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Ok, lets do it. I think you should work through it step by step though as well, so lets do the first step.
Separate the reaction into an oxidation reaction and a reduction reaction.
Oxidation is the loss of electrons (and therefore the increase in charge) and reduction would be the opposite. Look for the element's oxidation
states in everything and find where the changes are, separating into two reactions.
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"Nothing is too wonderful to be true if it be consistent with the laws of nature." -Michael Faraday
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woelen
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Write down the half reaction from permanganate to manganese(II). Acid is consumed in this reaction. Do the same for the half reaction for methanol to
formic acid. Then multiply both half reactions such that consumption and production of electrons is the same for both reactions. Using these
multipliers, add the two reactions.
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Magpie
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Remember that in aqueous acidic conditions H+ and H2O can be added as necessary to balance the half-reactions. Charge will also balance in these half
reactions, and in the combined reaction.
Then there is the matter of carbon's valence. Remember that adding bonds to hydrogen reduces carbon.
[Edited on 30-10-2011 by Magpie]
The single most important condition for a successful synthesis is good mixing - Nicodem
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