The EM^(3+)/M^(2+)o values for Cr, Mn, Fe and Co are -0.41, +1.57, +0.77 and +1.97 V respectively. For which one of following metal the change in…

Question

The EM^(3+)/M^(2+)o values for Cr, Mn, Fe and Co are -0.41, +1.57, +0.77 and +1.97 V respectively. For which one of following metal the change in oxidation state from +2 to +3 easiest?

MARKS Content Team · Accepted Answer

Correct answer: (D) Cr. Here ERPo of Cr = - 0.41 so its EOPo is 0.41. As here EOPo for Cr^(2+)/Cr^(3+) is maximum +0.41 V so Cr^(2+) will be easily oxidised to Cr^(3+) . For rest of the metals EOPo will be negative so they have less tendency to be oxidized then Cr here.

The $E_{M^{3 +} / M^{2 +}}^{o}$ values for Cr, Mn, Fe and Co are -0.41, +1.57, +0.77 and +1.97 V respectively. For which one of following metal the change in oxidation state from +2 to +3 easiest?

Solution

More Electrochemistry Questions

The EM3+/M2+o values for Cr, Mn, Fe and Co are -0.41, +1.57, +0.77 and +1.97 V respectively. For which one of following metal the change in oxidation state from +2 to +3 easiest?

Solution

More Electrochemistry Questions

The $E_{M^{3 +} / M^{2 +}}^{o}$ values for Cr, Mn, Fe and Co are -0.41, +1.57, +0.77 and +1.97 V respectively. For which one of following metal the change in oxidation state from +2 to +3 easiest?