Balance the following question in basic medium: MnO4^- (aq) +BrO3^-(aq) > MnO2 (s) + BrO4^- (aq)

Solutions

Expert Solution

The unbalanced reaction is

The oxidation number of Mn decreases from +7 to +4. The decrease in the oxidation number of Mn is 3.

The oxidation number of Br increases from +5 to +7. The decrease in the oxidation number of Br is 2.

Multiply Mn species with coefficient 2 and Br species with coefficient 3.

Balance O atoms by adding one water molecule to products side

Balance H atoms by adding 2 protons to reactants side.

Since the reaction occurs in basic medium, add 2 hydroxide ions on both sides.

On reactants side, 2 protons combine with 2 hydroxide ions to form 2 water molecules.

One water molecule cancels out on both sides.

This is balanced chemical equation in basic medium.

queen_honey_blossom answered 1 year ago

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