See your other post above. If you don't know how to assign oxidation states I refer you to the link below. In fact this site has MANY good explanations so you may want to remember this address. For oxidation numbers refer on the site to the oxidation/reduction link.
//www.chemteam.info/ChemTeamIndex.html
Identify the substance oxidized, the substance reduced, and, if any, spectator ions.
Cl2 (aq) + 2KI (aq) → I2 (s) + 2KCl (aq)
Oxidation:
Reduction:
Spectator Ions:
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