Electrochemistry

$E_{1},E_{2}$ and $E_{3}$ are the emf of the following three galvanic cells respectively (i)…

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 /…

For a reaction, $A+B^{2+}\longrightarrow\,B+A^{2+}$, at $25^{0}CE^{0}=0.2955V$. The value of $K_{\mathrm{eq}}$ is

Calculate the molarity of a solution containing 5 g of NaOH dissolved in the product of $\mathrm{H}_2-\mathrm{O}_2$ fuel cell operated at 1 A current for 595.1 hours. (Assume $\mathrm{F}=96500 \mathrm{C} / \mathrm{mol}$…

The pH of 0.5 L of 1.0 M NaCl solution after electrolysis for 965 s using 5.0 A current is,

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 /…

Which of the following solutions of $\mathrm{KCl}$ will have the highest value of specific conductance?

Electrode potential data are given below: $\mathrm{Fe}^{+3}(\mathrm{aq})+\mathrm{e}^{-} \longrightarrow \mathrm{Fe}^{+2}(\mathrm{aq}) ; \mathrm{E}^{\circ}=+0.77 \mathrm{~V}$ $\mathrm{Al}^{3+}(\mathrm{aq})+3…

The conductivity of a weak acid HA of concentration $0.001 \mathrm{~mol} \mathrm{~L}^{-1}$ is $2.0 \times 10^{-5} \mathrm{~S} \mathrm{~cm}^{-1}$. If $\Lambda_{\mathrm{m}}^{\circ}(\mathrm{HA})=190 \mathrm{~S}…

At $25^{\circ} \mathrm{C}$, the molar conductance at infinite dilution for the strong electrolytes $\mathrm{NaOH}, \mathrm{NaCl}$ and $\mathrm{BaCl}_{2}$ are $248 \times 10^{-4}, 126 \times 10^{-4}$ and $280 \times…

What time in sec is required for depositing all the silver present in $125 \text{ml}$ of $1 M {\text{AgNO} }_{3}$ solution by passing a current of $241\cdot 25$ A (Given $1 F= 96500 C$)

${E}_{1}, {E}_{2}$ and ${E}_{3}$ are the emf of the following three galvanic cells respectively (i) $\text{Zn} (s)|{\text{Zn} }^{2+}(0\cdot 1 M)||{\text{Cu} }^{2+}(1 M)|\text{Cu} (s)$ (ii) $\text{Zn} (s)|{\text{Zn}…