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Hashimbuba3155
Joined: 21 Apr 2008
Posts: 2
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 Posted: Sun May 18, 2008 10:40 pm Post subject: Oxidation Reduction problems |
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I have a quick question on these types of problems involving electrochemistry. When given the Ecell of two 1/2 reactions, how do you go about determining whether to flip the sign of one as opposed to the other. These problems are giving me fits...
Thanks in advance! |
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admin
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Joined: 08 Dec 2003
Posts: 2176
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| Posted: Sat May 24, 2008 2:51 pm Post subject: |
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Your objective with these problems is to end up with the highest positive Eo value: that's it, that's all.
For example, if there is a reduction potential table and the Eo values are 3 and 2. The equation with Eo = 3 will occur as written because it has the highest value and the other equation will be switched so that that half cell has Eo = -2.
Keep in mind: positive Eo values for a cell suggests that the reaction would proceed spontaneously as written. |
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