Thiosulfate anion (S₂O₃^2-) is used in fiber industry for the treatment of excess chlorine.

Balance the oxidation-reduction reaction under acidic conditions knowing that the weak acid HSO₄^- is formed.

Question

Thiosulfate anion (S₂O₃^2-) is used in fiber industry for the treatment of excess chlorine.

Balance the oxidation-reduction reaction under acidic conditions knowing that the weak acid HSO₄^- is formed.

| General Chemistry 2

Accepted Answer

First half reaction:

S₂O₃^2- → HSO₄^- (unbalanced)

S₂O₃^2- + 5 H₂O → 2 HSO₄^- + 8 H⁺ + 8 e^- (balanced)

Second half reaction:

Cl₂ → Cl^- (unbalanced)

Cl₂ + 2 e^- → 2 Cl^-

Oxidation-reduction reaction:

S₂O₃^2- + 5 H₂O + 4 Cl₂ → 2 HSO₄^- + 8 H⁺ + 8 Cl^-

Final - Question 10 | General Chemistry 2