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PREDICTING REDOX REACTIONS

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777888:
When it says chlorine solution, does it mean Cl-(aq) or Cl2(aq)? Similarly, iodine solution refers to I-(aq) or I2(aq)? ???

For example,
""An aqueous chlorine solution"" is added to a phosphorous acid solution.

Thanks for your *delete me*

Donaldson Tan:
aqueous chlorine solution refer to Cl2 (aq). It is actually an equilibrium mixture of chlorine, chloride and chlorate(I), because chlorine disproportionates in water. aqueous iodine exhibits similar property

AWK:
 (PO3(3-) does not exists. H3PO3 is a diprotic acid, ie it can exchange only two protons during neutralization.
In solution of H3PO3 only (H+), H2PO3(-) and HPO3(2-) exist

777888:

--- Quote from: AWK on October 26, 2004, 01:45:34 AM --- (PO3(3-) does not exists. H3PO3 is a diprotic acid, ie it can exchange only two protons during neutralization.
In solution of H3PO3 only (H+), H2PO3(-) and HPO3(2-) exist

--- End quote ---

But there is only H3PO3 in my redox table, but no PO3(3-), H2PO3(-) and HPO3(2-).. But I need to copy the half reactions from the redox table for the strongest oxidizing and reducing agent. So does that mean in the question,
 "An aqueous chlorine solution is added to a phosphorous acid solution"
The species initally present would be: Cl2, H2O, H+, H3PO3 ?  
INSTEAD OF: Cl2, H2O, H+, PO3(3-) ? :help:

777888:

--- Quote from: 777888 on October 26, 2004, 10:15:04 AM ---But there is only H3PO3 in my redox table, but no PO3(3-), H2PO3(-) and HPO3(2-).. But I need to copy the half reactions from the redox table for the strongest oxidizing and reducing agent. So does that mean in the question,
 "An aqueous chlorine solution is added to a phosphorous acid solution"
The species initally present would be: Cl2, H2O, H+, H3PO3 ?  
INSTEAD OF: Cl2, H2O, H+, PO3(3-) ? :help:

--- End quote ---
Just to make sure if I get the right idea!

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