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Electrochemical Series

The reduction...

Question

The reduction potential values are given below:
$A l^{3 +} / A l = - 1.67 v o l t, M g^{2 +} / M g = - 2.34 v o l t$ ,
$C u^{2 +} / C u = + 0.34 v o l t, I_{2} / 2 I^{-} = + 0.53 v o l t$ .
Which one is the best reducing agent?

A l

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M g

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C u

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I_{2}

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Solution

The correct option is D $M g$
Lower the reduction potential better is the reducing agent.
Among these four $M g$ is having least reduction potential so it is best reducing agent among these four.

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Similar questions

{A l}^{3 +} / A l = - 1.67 v o l t, {M g}^{2 +} / M g = - 2.34 v o l t {C u}^{2 +} / C u = + 0.34 v o l t

I_{2} / {2 l}^{-} = + .053 v o l t

M g^{2 +} / M g

- 2.37 V

C u^{2 +} / C u

0.337

E_{c e l l}^{o}

M g + C u^{2 +} \to M g^{2 +} + C u

E^{\circ} (S R P)

E_{C u^{2 +} / C u}^{\circ} = 0.34 v o l t; E_{Z n^{2 +} / Z n}^{\circ} = - 0.76 v o l t

E_{A g^{+} / A g}^{\circ} = 0.8 v o l t; E_{M g^{2 +} / M g}^{\circ} = - 2.37 v o l t

Δ G^{\circ}

C u (N O_{3})_{2}, A g N O_{3}, H g_{2} (N O_{3})_{2}

M g (N O_{3})_{2}

A g / A g^{+} = + 0.80, 2 H g / H g_{2}^{2 +} = + 0.79, C u / C u^{2 +} = + 0.34, M g / M g^{2 +} = - 2.37

C u (N O_{3})_{2}, A g N O_{3},

H g_{2} (N O_{3})_{2}

A g | A g^{⨁} = + 0.80, 2 H g | H g_{2}^{2 +} = + 0.79

C u | C u_{2 +} = + 0.34, M g | M g^{2 +} = - 2.37

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