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Topic: How do I identify the 2 redox half-reactions.  (Read 2232 times)

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Offline GMCSlizz

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How do I identify the 2 redox half-reactions.
« on: June 05, 2011, 12:41:58 AM »
Hi, I am faced with a question of identifying the 2 redox half-reactions in the following equation:

IO3- + I- + H+ --> I2 + H20

The last time I worked with redox half reactions was high school 5 years ago and the course I am in now does not deal with the topic, yet there are questions on it for a pre-lab assignment.

From my understanding, one of the half-reactions is: IO3- ----> I2 as there is a change in oxidation number of I, yet I am lost in identifying the other half-reaction.

Any help would be greatly appreciated. Thank you.
PS, I hope I figured out the superscript/subscript business properly, but if not I'll clarify.

Offline Borek

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Re: How do I identify the 2 redox half-reactions.
« Reply #1 on: June 05, 2011, 04:54:49 AM »
You have iodine with two different oxidation numbers on the left, but with one oxidation number on the right. You may try to assume product of both half reactions is identical.
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Offline GMCSlizz

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Re: How do I identify the 2 redox half-reactions.
« Reply #2 on: June 05, 2011, 11:46:48 AM »
Thank you. I see it now.

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