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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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rizzlepuff8 rizzlepuff8
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11 years ago
What is the balanced net ionic equation for the reaction below in acidic solution? Enter the coefficient for each substance. Do not leave any answer box blank. Enter 1 if appropriate, or 0 (zero) if the substance does not appear on that side of the equation.
Mn2+ + BiO31- + H1+ + H2O
Bi3+ + MnO41- + H1+ + H2O
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microbioflopmicrobioflop
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11 years ago
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11 years ago
Your nomenclature leaves something to be desired, but here goes:
The usual reaction is that permaganate (MnO4-1) oxidizes something while the Mn+7 oxidation state is reduced, in this case,  to the Mn+2 state.  Thus, we would expect that Bi+3 is oxidized to the Bi+5 state in BiO3-.  

We do the half-reactions, using water to and hydrogen ion to balance H and O requirements.  

For the permangate-Mn+2 reaction:
MnO4- +  8H+  5e  ->  Mn+2 +  4H2O and for the other reaction:
Bi+3  + 3H2O    ->      BiO3- +   6H+  +  2e.
We multiply the first reaction by 2 and the second by 5, and add to get:
2MnO4- + 5 Bi+3 + 7 H2O -> 2Mn+2 +  5 BiO3-  + 14  H+
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