ElectrochemistryMedium
Question
For the reduction of NO3- ion in an aqueous solution, Eo is +0.96 V. Values of Eo for some metal ions are given below
V2+ (aq) + 2e- → V Eo = - 1.19 V
Fe3+(aq) + 3e- → Fe Eo = - 0.04 V
Au3+(aq) + 3e- → Au Eo = + 1.40 V
Hg2+ (aq) + 2e- → Hg Eo = + 0.86 V
The pair(s) of metals that is(are) oxidized by NO3- in aqueous solution is(are)
V2+ (aq) + 2e- → V Eo = - 1.19 V
Fe3+(aq) + 3e- → Fe Eo = - 0.04 V
Au3+(aq) + 3e- → Au Eo = + 1.40 V
Hg2+ (aq) + 2e- → Hg Eo = + 0.86 V
The pair(s) of metals that is(are) oxidized by NO3- in aqueous solution is(are)
Options
A.V and Hg
B.Hg and Fe
C.Fe and Au
D.Fe and V
Solution
EoNO3- (aq)(SRP) = 0.96 V All V, Fe, Hg have less SRP w.r.t. NO3-.
So, V, Fe, Hg can be oxidized by NO3- in aqueous solution.
So, V, Fe, Hg can be oxidized by NO3- in aqueous solution.
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