Question #284507

1.    Balance each of the following equations according to the half-reaction method:

a) Br2(l) + SO2(g) ⟶ Br−(aq) + SO42−(aq)                               (in acid)

b) Cl2(g) + OH−(aq) ⟶ Cl−(aq) + ClO3−(aq)                            (in base)

 



Expert's answer

a) Br2(l) + 2e- =  2Br−(aq) 

 SO2(g) + 2H2O (l) =  SO42−(aq) + 4H+ (aq) +2e-


Total: Br2(l) + SO2(g) + 2H2O (l) =  2Br−(aq) + SO42−(aq) + 4H+ (aq)


b) Cl2(g) + 2e- =  2Cl−(aq) 

 Cl2(g) + 12OH−(aq) = 2ClO3−(aq) + 6H2O (l) + 10e-


Total:  3Cl2(g) + 6OH−(aq) = 5Cl−(aq) + ClO3−(aq) + 3H2O (l)




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