Electrochemistry

Given that $E_{\mathrm{O}_2 / \mathrm{H}_2 \mathrm{O}}^{\circ}=+1.23 \mathrm{~V}$; $\begin{aligned} & E_{\mathrm{S}_2 \mathrm{O}_8^{2-} / \mathrm{SO}_4^{2-}}^{\circ}=2.05 \mathrm{~V} ; E_{\mathrm{Br}_2 /…

Consider the change in oxidation state of Bromine corresponding to different emf values, as shown in the diagram below: Then, what is the species undergoing disproportionation?

Identify the reaction from following having topposition in EMF series (Std.red. potential) accordingto their electrode potential at$298K.$

The molar conductivity of $0.007M$ acetic acid is $20S\mathrm{cm}^{2}\mathrm{mol}^{-1}.$ What is the dissociation constant of acetic acid? Choose the correct option.…

$E_{\mathrm{Cu}^{2+}|\mathrm{Cu}}^{0}=+0\operatorname{.34}\,V$ $E_{\mathrm{Zn}^{2+}|\mathrm{Zn}}^{0}=-0\operatorname{.76}\,V$ Identify the incorrect statement from the options below for the above cell:

For lead storage battery pick the correct statements A. During charging of battery, $\mathrm{PbSO}_{4}$ on anode is converted into$\mathrm{PbO}_{2}$ B. During charging of battery, $\mathrm{PbSO}_{4}$ on cathode is…

At $298\text{ K}$, the molar conductivity of $x\%$ (w/w) $MX$ solution (aqueous) is $123.5\text{ S cm}^2\text{ mol}^{-1}$. The conductance of same solution is $1.9 \times 10^{-3}\text{ S}$. The value of $x$ is _______…

Electricity is passed through an acidic solution of $\mathrm{Cu}^{2+}$ till all the $\mathrm{Cu}^{2+}$ was exhausted, leading to the deposition of 300 mg of Cu metal. However, a current of 600 mA was continued to pass…

Consider the following data. Electrolyte$\Lambda^{\circ}_m$ (S cm$^2$ mol$^{-1}$)$\text{BaCl}_2$$x_1$$\text{H}_2\text{SO}_4$$x_2$HCl$x_3$ $\text{BaSO}_4$ is sparingly soluble in water. If the conductivity of the…

Consider the following redox reaction taking place in acidic medium $\mathrm{BH}_{4}^{-}(a q)+\mathrm{ClO}_{3}^{-}(a q) \longrightarrow \mathrm{H}_{2} \mathrm{BO}_{3}^{-}(a q)+\mathrm{Cl}^{-}(a q)$ If the Nernst…

An electrochemical cell is constructed using half cells in the direction of spontaneous change $Fe(OH)_2(s) + 2e^- \rightarrow Fe(s) + 2OH^-(aq) \quad E^\theta = -0.88$ V and $AgBr(s) + e^- \rightarrow Ag(s) + Br^-(aq)…

A volume of $x\,\mathrm{mL}$ of $5\,\mathrm{M}\,\mathrm{NaHCO_3}$ solution was mixed with $10\,\mathrm{mL}$ of $2\,\mathrm{M}\,\mathrm{H_2CO_3}$ solution to make an electrolytic buffer. If the same buffer was used in…