CoCl_​2 + HO₂ ^1- --------------) Co(OH)₃ + Cl-
balance the above reaction by ion electron method
pls ans it fast its urgent

First your question is incomplete as reaction medium is not mention. And consider this reaction in alkaline medium and in alkaline medium H₂O₂ get converted to HO₂^-1 .
The reaction is redox reaction,and the two half reactions are :

• Oxidation :

            $C{o}^{2+ }\to C{o}^{3+} + e^{-} \left(1\right)$
                                                                
 

•  Reduction :

             $H_2{O}_2 + 2e^{-}\to 2O{H}^{-} (alkaline condition) \left(2\right)$
                    

            [ (1) $\times$2] + (2) gives..,

                 
              $C{o}^{2+} +\hspace{0.17em}{H}_2{O}_2 \to C{o}^{3+ }+ 2 O{H}^{-}$