Embibe Experts Solutions for Chapter: Electrochemistry, Exercise 1: ICSE-2020

Define the equivalent conductivity.

Define the corrosion of metals.

The specific conductivity of a solution containing $5$ g of anhydrous ${\mathrm{BaCl}}_2$ ( molecular weight$=208$) in $1000 {\mathrm{cm}}^3$ of a solution is found to be $0.0058 {\mathrm{ohm}}^{-1}{\mathrm{cm}}^{-1 }$. Calculate the molar and equivalent conductivity of the solution.

What is an electrochemical series? How is it useful in predicting whether a metal can liberate hydrogen from acid or not?

The cell reaction is spontaneous or feasible when emf of the cell is:

The molar conductivity of $\mathrm{NaCl}, {\mathrm{CH}}_3\mathrm{COONa}$ and $\mathrm{HCl}$ at infinite dilution is $126.45, 91.0$ and $426.16 {\mathrm{ohm}}^{-1}{\mathrm{cm}}^2{\mathrm{mol}}^{-1}$ respectively. Calculate the molar conductivity $\left({\mathrm{\lambda }}_{\mathrm{m}\infty }\right)$ for ${\mathrm{CH}}_3\mathrm{COOH}$ at infinite dilution.

Calculate the degree of dissociation $(\propto )$ of acetic acid, if its molar conductivity $\left({\mathrm{Ʌ}}_{\mathrm{m}}\right)$ is $39.05 \mathrm{S} {\mathrm{cm}}^2 {\mathrm{mol}}^{-1}$. 

Given: $\mathrm{\lambda }{°}_{\left({\mathrm{H}}^{+}\right)}=349.6 \mathrm{S} {\mathrm{cm}}^2 {\mathrm{mol}}^{-1}$ and $\mathrm{\lambda }{°}_{\left({\mathrm{CH}}_3{\mathrm{COO}}^{-}\right)}=40.9 \mathrm{S} {\mathrm{cm}}^2 {\mathrm{mol}}^{-1}$.

Calculate the emf and $\mathrm{\Delta G}$ for the given cell at $25 °\mathrm{C}$: $\mathrm{Cr}\left(\mathrm{s}\right)/{\mathrm{Cr}}^{3+}\left(0.1 \mathrm{M}\right)//{\mathrm{Fe}}^{2+}\left(0.01 \mathrm{M}\right)/\mathrm{Fe}\left(\mathrm{s}\right).$

Given: ${\mathrm{E}}_{{\mathrm{Cr}}^{3+}/\mathrm{Cr}}^{°}=-0.74 \mathrm{V}; {\mathrm{E}}_{{\mathrm{Fe}}^{2+}/\mathrm{Fe}}^{°}=-0.44 \mathrm{V}; [1\mathrm{F}=96500 \mathrm{C}; \mathrm{R}=8.314 \mathrm{J} {\mathrm{K}}^{-1} {\mathrm{mol}}^{-1}]$.