Anode
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Generation of free radicals, active oxygen, and hydrogen peroxide
H2O = H+ + •OH + e-
•OH + •OH = H2O2 H2O = •O + 2H+ + 2e- O2- = 2O + e-
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Generation of ozone gas
3H2O = O3 + 6H+ + 6e- •O + O2 = O3 O2 + H2O = O3 + 2H+ + 2e- (E0 = 2.07 V)
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Generation of oxygen gas
2H2O = O2 + 4H+ + 4e- 4OH- = O2 + 2H2O + 4 e- H2O2 = O2 + 2H+ + 2e- 2Cl2 + 2H2O = 4H+ + 4Cl- + O2
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Generation of oxygen gas and chlorine gas
4Cl- + 2O3 + 4H+ = 3O2 + 2Cl2 + 2H2 2Cl- + 2O3 = 3O2 + Cl2 + 2e-
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Generation of chlorine gas and dissolved chlorine
2Cl- = Cl2(g) + 2e- (E0 = 1.359V) 2HOCl + 2H+ + 2e- = Cl2 + 2H2O (E0 = 1.63V) Cl2(g) = Cl2(aq)
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Generation of hypochlorous acid and hypochloric acid
Cl2(ap) + H2O = HCl (=H+ + Cl-) + HOCl Cl- + H2O = HOCl + H+ + 2e- 2Cl- + H2O = HOCl + HCl + 2e- 2Cl- + H2O2 = 2HOCl + 2e- ClO- + H2O = HOCl + OH-
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Generation of hypochlorite ion, etc.
Cl2(aq) + 2OH- = ClO- + Cl- + H2O Cl2(aq) + H2O = ClO- + Cl- + 2H+ HOCl = ClO- + H+ 2HOCl ClO- = ClO3 - + 2Cl- + 2H+
The liquid produced at the Anode is known as ATHOX and is a powerful disinfection agent.
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Cathode
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Generation of hydrogen gas
2H2O + 2e- = H2 + 2OH- (E0 = -0.828 V) 2H2O = H2 + 2•OH
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Generation of hydrogen and sodium hydrate
2Na+ + 2H2O + 2e- = H2 + 2NaOH 2Na + 2H2O = H2 + 2NaOH Na+ + OH- = NaOH
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Generation of hydroxide ion and separation of sodium
Na+ + e- = Na 2•OH + 2e- = 2OHO 2 + 2H2O + 4e- = 4OH
The liquid produced at the Cathode is a useful cleaning and degreasing agent.
Neuthox is a mixture of these two liquids providing a powerful cleaning and disinfection agent.
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