For M2+M and M3+M2+ systems the E∘ values for some metals are as fol

1.	For M2+M and M3+M2+ systems the E∘ values for some metals are as follows: Cr2+Cr−0.9V;Cr3+Cr2+−0.4VMn2+Mn−1.2V;Mn3+Mn2++1.5VFe2+Fe−0.4V;Fe3+Fe2++0.8V Use this data to comment upon (i) The stability of Fe3+ in acid solution as compared to that of Cr3+ or Mn3+ The ease with which iron can be oxidised as compared to a similar process of either chromium or manganese metal.
Answer» For $\frac{M^{2 +}}{M}$ and $\frac{M^{3 +}}{M^{2 +}}$ systems the $E^{\circ}$ values for some metals are as follows: $\frac{C r^{2 +}}{C r - 0.9 V}; \frac{C r^{3 +}}{C r^{2 +} - 0.4 V} \frac{M n^{2 +}}{M n - 1.2 V}; \frac{M n^{3 +}}{M n^{2 +}} + 1.5 V \frac{F e^{2 +}}{F e - 0.4 V}; \frac{F e^{3 +}}{F e^{2 +}} + 0.8 V$ Use this data to comment upon (i) The stability of $F e^{3 +}$ in acid solution as compared to that of $C r^{3 +}$ or $M n^{3 +}$ The ease with which iron can be oxidised as compared to a similar process of either chromium or manganese metal.

For M2+M and M3+M2+ systems the E∘ values for some metals are as follows: Cr2+Cr−0.9V;Cr3+Cr2+−0.4VMn2+Mn−1.2V;Mn3+Mn2++1.5VFe2+Fe−0.4V;Fe3+Fe2++0.8V Use this data to comment upon (i) The stability of Fe3+ in acid solution as compared to that of Cr3+ or Mn3+ The ease with which iron can be oxidised as compared to a similar process of either chromium or manganese metal.

Answer»

For $\frac{M^{2 +}}{M}$ and $\frac{M^{3 +}}{M^{2 +}}$ systems the $E^{\circ}$ values for some metals are as follows:
$\frac{C r^{2 +}}{C r - 0.9 V}; \frac{C r^{3 +}}{C r^{2 +} - 0.4 V} \frac{M n^{2 +}}{M n - 1.2 V}; \frac{M n^{3 +}}{M n^{2 +}} + 1.5 V \frac{F e^{2 +}}{F e - 0.4 V}; \frac{F e^{3 +}}{F e^{2 +}} + 0.8 V$
Use this data to comment upon
(i) The stability of $F e^{3 +}$ in acid solution as compared to that of $C r^{3 +}$ or $M n^{3 +}$

The ease with which iron can be oxidised as compared to a similar process of either chromium or manganese metal.

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