For Cr, Mn, Fe, and Co,the E_{{M^{3+}}/{M^{2+ | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) The oxidation of a metal from the $+2$ to the $+3$ state is represented by the half-reaction: $M^{2+} \rightarrow M^{3+} + e^-$. This process is f

Vedclass · Accepted Answer

$Cr$

Vedclass · Answer

(C) The oxidation of a metal from the $+2$ to the $+3$ state is represented by the half-reaction: $M^{2+} \rightarrow M^{3+} + e^-$. This process is favored when the reduction potential $E_{{M^{3+}}/{M^{2+}}}^{\circ}$ is low. $A$ lower (or more negative) value of $E_{{M^{3+}}/{M^{2+}}}^{\circ}$ indicates that the $M^{2+}$ ion is more easily oxidized to the $M^{3+}$ ion. Comparing the given values: $Cr: -0.41 \ V$ (Note: The value for $Cr^{3+}/Cr^{2+}$ is actually negative,$-0.41 \ V$) $Mn: +1.57 \ V$ $Fe: +0.77 \ V$ $Co: +1.97 \ V$ Since $Cr$ has the lowest (most negative) reduction potential,it is the most easily oxidized from the $+2$ to the $+3$ state.

For $Cr, Mn, Fe,$ and $Co$,the $E_{{M^{3+}}/{M^{2+}}}^{\circ}$ values are $0.41, +1.57, +0.77,$ and $+1.97 \ V$ respectively. Which of these metals is most easily oxidized from the $+2$ to the $+3$ oxidation state?

Similar Questions

How many elements are there in the third transition series?

Write a brief note on the electronic configurations of the transition elements.

Which element belongs to the $d-$block?

Which of the following statements is incorrect?

Elements which generally exhibit multiple oxidation states and whose ions are usually coloured are

Vedclass Test Series

Exam Paper Generator

Online Exam Module