Si + 2F2 + 6OH- = 4F- + SiO32- + 3H2O
Si - 4e = Si4+
F2 + 2e = 2F-
name of the element oxidized: silicon Si
name of the element reduced: fluorine F
formula of the oxidizing agent: F2
formula of the reducing agent: Si
2F- + HgO + H2O = Hg + F2 + 2OH-
2F- -2e = F2
Hg2+ + 2e = Hg
name of the element oxidized: fluorine F
name of the element reduced: mercury Hg
formula of the oxidizing agent: HgO
formula of the reducing agent: F-
H2C2O4 + 2Cr3+ = 2CO2 + 2Cr2+ + 2H+
2C3+ - 2e = 2C4+
Cr3+ + 1e = Cr2+
name of the element oxidized: carbon C
name of the element reduced: chromium Cr
formula of the oxidizing agent: Cr3+
formula of the reducing agent: H2C2O4
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