Cl2 Br2 I2 Fe^2+(aq) Fe^3+(aq)

Cl2 Br2 I2 Fe^2+(aq) Fe^3+(aq)

Which of the following elements is capable of oxidizing

Fe^2+(aq) ions to Fe^3+(aq) ions: chlorine, bromine, iodine?

(a) I2 (b) Cl2 (c) Cl2 and I2 (d) Cl2 and Br2 (e) all three elements

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▶ 표준 환원 전위

> Cl2 + 2e^- → 2Cl^- ... E° = +1.36 V

> Br2 + 2e^- → 2Br^- ... E° = +1.09 V

> Fe^3+ + e^- → Fe^2+ ... E° = +0.77 V

> I2 + 2e^- → 2I^- ... E° = +0.54 V

( 자료 https://ywpop.tistory.com/7027 )

표준 환원 전위 값이 더 큰 물질이

표준 환원 전위 값이 더 작은 물질을 산화시킬 수 있으므로,

답: (d) Cl2 and Br2

[키워드] 표준 환원 전위 기준

Using a table of standard reduction potentials, select the following elements that are capable of oxidizing Fe^2+(aq) ions to Fe^3+(aq) ions: oxygen, chlorine, bromine, iodine?