Mno−4(aq)+br−(aq)→mno2(s)+bro−3(aq) (basic solution)

Balance each of the following redox reactions occurring in basic solution. a) MnO−4(aq)+Br−(aq)→MnO2(s)+BrO−3(aq)

MnO−4(aq)+H2O(l)+Br−(aq)→MnO2(s)+2OH−(aq)+BrO−3(aq)
2MnO−4(aq)+H2O(l)+Br−(aq)→2MnO2(s)+2OH−(aq)+BrO−3(aq)
2MnO−4(aq)+H2O(l)+Br−(aq)→2MnO2(s)+OH−(aq)+BrO−3(aq)
MnO−4(aq)+H2O(l)+2Br−(aq)→MnO2(s)+OH−(aq)+2BrO−3(aq)
b) Ag(s)+CN−(aq)+O2(g)→Ag(CN)−2(aq)
2Ag(s)+4CN−(aq)+2O2+H2O(l)(g)→2Ag(CN)−2(aq)+2OH−(aq)
2Ag(s)+8CN−(aq)+4O2+2H2O(l)(g)→4Ag(CN)−2(aq)+8OH−(aq)
4Ag(s)+2CN−(aq)+O2+4H2O(l)(g)→4Ag(CN)−2(aq)+8OH−(aq)
4Ag(s)+8CN−(aq)+O2+2H2O(l)(g)→4Ag(CN)−2(aq)+4OH−(aq)
c) NO−2(aq)+Al(s)→NH3(g)+AlO−2(aq)
NO−2(aq)+H2O(l)+2Al(s)+OH−(aq)→NH3(g)+2AlO−2(aq)
2NO−2(aq)+H2O(l)+2Al(s)+OH−(aq)→2NH3(g)+2AlO−2(aq)
2NO−2(aq)+H2O(l)+Al(s)+2OH−(aq)→2NH3(g)+AlO−2(aq)
NO−2(aq)+2H2O(l)+Al(s)+2OH−(aq)→NH3(g)+AlO−2(aq)
Please show work and explain why

Answer

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