If E1° is standard electrode potential for Fe / Fe 2+ and E2° is for Fe 2+ / Fe 3+ and E3° for Fe 2 / Fe 3+. A relation between E1°. E2° and E3° is:

Question

If E1° is standard electrode potential for Fe / Fe 2+ and E2° is for Fe 2+ / Fe 3+ and E3° for Fe 2 / Fe 3+. A relation between E1°. E2° and E3° is: (A) 3 E3°=2 E1°+E2° (B) E3°=2 E1°+3 E2° (C) E3°=E1°+E2° (D) E3°=3 E1°-E2°

Tardigrade Admin · Accepted Answer

Correct answer is (a) 3 E3°=2 E1°+E2°

Q. If $E_{1}^{\circ}$ is standard electrode potential for $F e / F e^{2 +}$ and $E_{2}^{\circ}$ is for $F e^{2 +} / F e_{3 +}$ and $E_{3}^{\circ}$ for $F e^{2} / F e^{3 +}$ . A relation between $E_{1}^{\circ}$ . $E_{2}^{\circ}$ and $E_{3}^{\circ}$ is:

$3 E_{3}^{\circ} = 2 E_{1}^{\circ} + E_{2}^{\circ}$

$E_{3}^{\circ} = 2 E_{1}^{\circ} + 3 E_{2}^{\circ}$

$E_{3}^{\circ} = E_{1}^{\circ} + E_{2}^{\circ}$

$E_{3}^{\circ} = 3 E_{1}^{\circ} - E_{2}^{\circ}$

Correct answer is (a) $3 E_{3}^{\circ} = 2 E_{1}^{\circ} + E_{2}^{\circ}$

Q. If E1∘​ is standard electrode potential for Fe/Fe2+ and E2∘​ is for Fe2+/Fe3+​ and E3∘​ for Fe2/Fe3+. A relation between E1∘​. E2∘​ and E3∘​ is:

3E3∘​=2E1∘​+E2∘​

E3∘​=2E1∘​+3E2∘​

E3∘​=E1∘​+E2∘​

E3∘​=3E1∘​−E2∘​