1.

Consider the following reaction occuring in basic medium 2MnO_(4)^(-) + Br^(-)(aq) to2MnO_(2) (s) + BrO_(3)^(-) (aq) Howthe abovereactioncan bebalancedfurther ?

Answer»

By adding `2 OH^(-)` ions on RIGHT side
By adding one `H_(2)O` MOLECULE to left side
By adding `2H^(+)` ions on right side
Both (a) and (B)

Solution :Sincereaction is occuringinbasic medium THEREFORE`2 OH^ -`areaddedon rightside.
`2 Mn O_4 ^ -(aq )+Br ^ -(aq )to2 Mn O_ 2(s )+ Br O_3 ^ -( aq)+2 OH ^ -( aq ) `
Now,hydrogenatoms canbebalancedby addingone` H _ 2O `moleculeto theleftside
`2 MnO_4 ^ -(aq )+ Br ^ -(aq )+ H _ 2 O( l)to2 MnO_ 2 ( s )+Br O_ 3 ( aq )+2OH ^ (-)(aq ) `


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