Question

PRACTICE
PROBLEMS
SET - 3.1
1. Given standard electrode potentials in volta in 1 M
acidie solution Fe/Fe-04 V: Feet = 0.8 V:
Mn/Mn-1.2 V; Mn/Mn +1.5 V
Comment on relative stability of +2 and +3
oxidation state of iron and Mn
w) Which of the two metals is more easily oxidised
to + 2 state​

Answer 1

Answer:

Explanation:

(i) State Ti4+/Ti3+ has lower reduction potential than Fe3+/Fe2+, it cannot be reduced in comparison with Fe3+/Fe2+ ions.

Hence, Ti4+ cannot oxidise Fe2+ to Fe3+.

(ii) As the value of reduction potential increases the stability of +2 oxidation increases. Therefore, correct order of stability is :

Cr3+/Cr2+<Fe3+/Fe2+<Mn3+/Mn2+