1. C{-1}H2OH, C{4+}O2, C{0}H2O
HS{4+}O3, HS{2-}, S2{2+}O3
2. 2HIO3+5H2O2=I2+5O2+6H2O
2I{5+} + 10e = I2{0} /1
2O{-} - 2e = O2{0}. /5
2H2O2=O2+2H2O
2O{-} - 2e = O2{0} /1
O{-} + e = O{2-} /2
8Sc+30HNO3=8Sc(NO3)3+3N2O+15H2O
Sc{0} - 3e = Sc{3+}. /8
2N{5+} + 8e = 2N{+} /3