Geet has set-up the following galvanic cell by taking the electrolyte solution of and . How will…
Chemistry20253 marksCase based
Geet has set-up the following galvanic cell by taking the electrolyte solution of $\text{Pb}(\text{NO}_3)_2$ and $\text{CrCl}_3$.
$E^\circ = -0.13\text{ V}$
$E^\circ = -0.74\text{ V}$
(a)[1.0]
How will you design the feasible cell by taking appropriate salt solution in place of solution A and B?
(b)[1.0]
What is the applicability of the above cell?
(c)[1.0]
Consider, salt bridge is filled with Potassium Chloride (KCl) solution. How does salt bridge maintain electrical neutrality?
To convert chemical energy into electrical energy by redox reaction.
Answer (c)
Official answer key
In anodic half-cell, concentration of $\mathrm{Cr^{3+}}$ increases, hence, $\mathrm{Cl^-}$ ions are migrated from salt bridge to maintain electrical neutrality.
In cathodic half-cell, the concentration of $\mathrm{Pb^{2+}}$ decreases, hence, $\mathrm{K^+}$ ions are migrated from salt bridge to maintain electrical neutrality.
