Write a balanced half equation for the following couple: ClO2- | Cl- (basic)
A) ClO2- + 2 H2O + 4 e- → Cl- + 4 OH-
B) ClO2- + 4 H+ + 4 e- → Cl- + 2 H2O
C) ClO2- + H2O + e- → Cl- + OH-
D) ClO2- + H+ + e- → Cl- + H2O
E) ClO22- + 4 H2O + 8 e- → Cl- + 4 OH-
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