redox balance. ClO3^- + As2S3 → Cl^- + H3AsO4 + SO4^2- (acidic)

redox balance. ClO3^- + As2S3 → Cl^- + H3AsO4 + SO4^2- (acidic)

산화-환원 반응 완성하기. As2S3 + ClO3^- → H3AsO4 + SO4^2- + Cl^-

 

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▶ 참고: 산화-환원 반응 균형 맞추기 (산성 조건)

[ https://ywpop.tistory.com/4264 ]

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▶ 산화수 계산

> ClO3^-: O is –2, so Cl is +5.

> As2S3: S is –2, so As is +3.

> Cl^-: Cl is -1.

> H3AsO4: H is +1, O is –2, so As is +5.

> SO4^2-: O is –2, so S is +6.

 

 

 

1. 반쪽 반응식 나누기

산화: As2S3 → H3AsO4 + SO4^2-

환원: ClO3^- → Cl^-

> As2S3 is a reducing agent, ClO3^- is an oxidizing agent.

 

 

 

2. 질량 균형 맞추기

산화: As2S3 + 20H2O → 2H3AsO4 + 3SO4^2- + 34H^+

환원: ClO3^- + 6H^+ → Cl^- + 3H2O

 

 

 

3. 전하 균형 맞추기

산화: As2S3 + 20H2O → 2H3AsO4 + 3SO4^2- + 34H^+ + 28e^-

환원: ClO3^- + 6H^+ + 6e^- → Cl^- + 3H2O

 

 

 

4. 주고받은(이동한) 전자 수 같도록

산화: As2S3 + 20H2O → 2H3AsO4 + 3SO4^2- + 34H^+ + 28e^- (×3)

환원: ClO3^- + 6H^+ + 6e^- → Cl^- + 3H2O (×14)

 

산화: 3As2S3 + 60H2O → 6H3AsO4 + 9SO4^2- + 102H^+ + 84e^-

환원: 14ClO3^- + 84H^+ + 84e^- → 14Cl^- + 42H2O

 

 

 

5. 반쪽 반응식 더하기. 끝.

14ClO3^- + 3As2S3 + 18H2O → 14Cl^- + 6H3AsO4 + 9SO4^2- + 18H^+

 

 

3As2S3 + 14ClO3^- + 18H2O → 6H3AsO4 + 9SO4^2- + 14Cl^- + 18H^+

 

 

 

 

[키워드] redox ClO3^- + As2S3, redox As2S3 + ClO3^-, 예외 redox 예외 기준문서