List of top Chemistry Questions on Electrochemistry asked in TS EAMCET

Observe the given cell \[ Cr|Cr^{3+}(0.1M)||Fe^{2+}(0.01M)|Fe \] What is the cell potential (in V) for the above cell? Given: \[ E^\circ_{Cr^{3+}/Cr}=-0.74V \] \[ E^\circ_{Fe^{2+}/Fe}=-0.44V \] \[ \frac{2.303RT}{F}=0.06V \]

A student builds a galvanic cell utilizing the reaction \[ Ni(s)+2Ag^+(aq)\rightarrow Ni^{2+}(aq)+2Ag(s) \] \[ E^\circ=1.05V \] At \(25^\circ C\), what could the student do for the cell to generate a potential greater than that of the initial standard cell?

How many faradays of electricity are required to produce $12\,\mathrm{g}$ of magnesium from molten $\mathrm{MgCl_2}$?} \[ (\text{Atomic weight of Mg}=24\,\mathrm{g\,mol^{-1}}) \]

Three electrolytic cells P, Q and R containing aqueous solutions of \(Al(NO_3)_3\), \(AgNO_3\) and \(CuSO_4\) respectively are connected in series. A current of 1.5 A was passed until 1.45 g of Ag was deposited. Find the masses of Al and Cu deposited.

The following reaction takes place in a galvanic cell \[ 2Cr(s)+3Cd^{2+}(aq)\rightarrow2Cr^{3+}(aq)+3Cd(s) \] What is \(\Delta_rG^\circ\) of this cell? Given: \[ F=96500~Cmol^{-1} \] \[ E_{Cd^{2+}/Cd}^{\circ}=-0.4V \] \[ E_{Cr^{3+}/Cr}^{\circ}=-0.74V \]

The order of negative standard potential values of \(\text{Li}\), \(\text{Na}\), \(\text{K}\) is

At $298 \text{ K}$ the equilibrium constant for the reaction, $\text{M}(\text{s})+2\text{Ag}^+(\text{aq}) \rightleftharpoons \text{M}^{2+}(\text{aq})+2\text{Ag}(\text{s})$ is $10^{15}$. What is the $E_{\text{cell}}^{\circ}$ (in $\text{V}$) for this reaction? ($\frac{2.303 \text{ RT}}{F} = 0.06 \text{ V}$)

The molar conductivity of acetic acid solution at infinite dilution is 390 S cm$^2$ mol$^{-1}$. What is the molar conductivity of 0.01 M acetic acid solution (in S cm$^2$ mol$^{-1}$)? (Given: $K_a(\text{CH}_3\text{COOH})=1.8\times10^{-5}$, assume $1-\alpha \approx 1$)

The equilibrium constant for the reaction $M(s) + 2Ag^{+}(aq) \rightarrow M^{2+}(aq) + 2Ag(s)$ is $10^{15}$. What is the Gibbs energy change ($\Delta_r G^{\ominus}$ in KJ mol$^{-1}$) for this reaction?
($\frac{RT}{F} \times 2.303 = 0.06V$; F = 96500 C mol$^{-1}$)

At 298 K, equilibrium: M(s)+2Ag$^+$(aq)→M$^{2+}$(aq)+2Ag(s), K=10$^{15}$, ΔS=10 J/K. Find ΔrH (kJ/mol). FRT×2.303=0.06, F=96500 C/mol.

The Gibbs energy change of the reaction (in kJ mol⁻¹) corresponding to the following cell
Cr | Cr³⁺(0.1M) || Fe²⁺(0.01 M) | Fe
(Given: \(E^\circ_{Cr^{3+}/Cr} = -0.75V\); \(E^\circ_{Fe^{2+}/Fe} = -0.45V\), 1F = 96,500 C mol⁻¹)