Achieve question 2

[305963519]

In achieve question 2, can someone please walk me through how we should balance the first half reaction of BrO- being oxidized to BrO3-? I am confused how to do this since the ion has the same charge but different numbers of oxygen atoms.

The question reads..."for a particular redox reaction, BrO- is oxidized to BrO3- and Fe3+ is reduced to Fe2+. Complete and balance the equation for this reaction in basic solution."

[Erika Patel 3I]

To balance this reaction, you would need to add 2 H2O to the side with the BrO- so that the number of oxygens are equal. Then you would add 4OH- to that side and 4 H2O to the opposite side to balance the hydrogens. Finally, you balance charges by adding electrons. 2 of the waters should cancel out.