May 09, 2024, 04:10:41 AM
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Topic: Balancing Redox Reaction-oxidation of iodine ion & redcution of chloride  (Read 10440 times)

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Offline taylor2264

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I have been trying to figure this out all day I had a test earlier today and I know I missed it and any help will be greatly appreciated.

Cl2 + I- => IO3- + 2Cl-

    3H2O + I-=> IO3- + 6H+ + 6e-
3 (2e- +2Cl-=> Cl2)

3H2O + I- => IO3- + 6H+ + 6e-
6e- +6Cl- => 3Cl2                       cancel electrons and add reaction

3H2O + 6Cl- + I- => 6H+ + 3Cl2 + IO3-   

This is where I'm lost the charges are not equal, now I know for basic solutions you add OH- for every H+ and I even tried that but I still can not get my charges to equal.

Offline UG

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3 (2e- +2Cl- :rarrow: Cl2)
This half-equation is incorrect, the electrons are on the wrong side, also, it is Cl2 being reduced to 2Cl- not the other way round. Once these are fixed you should get a balanced equation.  :)

Offline taylor2264

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But for reduction the electrons go on the left side right?

Offline UG

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Yes.  :)
It would be Cl2 + 2e-  :rarrow: 2Cl-

Offline taylor2264

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Thank You So Much!! so the answer would be ;D
3H2O + I- + 3Cl2 => IO3- + 6Cl- + 6H+

Offline UG

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Yes!  :)
Just to be sure, it is IO3- and not IO3- right?

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