For which one of the following elements, M 3 + ∣ M 2 + standard electrode potential is more positive?

Question

For which one of the following elements, M 3 + &#8739; M 2 + standard electrode potential is more positive?

Aicharya · Accepted Answer

Element SEP ( M 3 + / M 2 + ) V V 3 + / V 2 + = - 0 . 26 &#160; V Cr Cr 3 + / Cr 2 + = - 0 . 4 &#160; V Mn Mn 3 + / Mn 2 + = 1 . 5 &#160; V Fe Fe 3 + / Fe 2 + &#160; = 0 . 8 &#160; V Mn 3 + / Mn 2 + has large positive value and M 3 + is least stable as it can be easily reduced to Mn 2 + .

Element	$SEP$ ( $M^{3 +} / M^{2 +}$ )
$V$	$V^{3 +} / V^{2 +} = - 0.26 V$
$Cr$	${Cr}^{3 +} / {Cr}^{2 +} = - 0.4 V$
$Mn$	${Mn}^{3 +} / {Mn}^{2 +} = 1.5 V$
$Fe$	${Fe}^{3 +} / {Fe}^{2 +} = 0.8 V$

For which one of the following elements, M 3 + &#8739; M 2 + standard electrode potential is more positive?

Solution

For which one of the following elements, M 3 + ∣ M 2 + standard electrode potential is more positive?