Balance the following equation in acidic solution using the lowest possible integers and give the coefficient of water.
MnO4-(aq) + H2SO3(aq) → Mn2+(aq) + HSO4-(aq)
a) 2
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12.1. Balance the following oxidation-reduction reactions using the half-reaction method, then indicate the number of electrons transferred in the balanced oxidation-reduction reaction.
a) MnO4-(aq) + SO2(g) ---> SO42-(aq) + Mn2+(aq) acidic solution
b) MnO4-(aq) + I-(aq) ---> MnO2(s) + IO3-(aq) basic solution
c) Sb(s) + H2SO4(aq) ---> Sb2(SO4)3(s) + SO2(g) acidic solution
d) Br2(aq) ---> BrO3-(aq) + Br-(aq) basic solution
In many residential water systems, the aqueous Fe3+ concentration is high enough to stain sinks and turn drinking water light brown. The iron content is analyzed by first reducing the Fe3+ to Fe2+ and then titrating with MnO4- in acidic solution.
Fe2+(aq) + MnO4-(aq) ? Mn2+(aq) + Fe3+(aq)
Balance the skeleton reaction of the titration step. (Use the lowest possible coefficients. Include states-of-matter under SATP conditions in your answer.)