Why is alternating current $(AC)$ used for measuring the resistance of an electrolytic solution?
(N/A) Alternating current $(AC)$ is used to prevent the occurrence of electrolysis in the electrolytic cell. If direct current $(DC)$ were used,it would lead to the migration of ions towards the electrodes and cause chemical changes,thereby altering the concentration of the solution. By using $AC$,the direction of the current changes rapidly,which prevents the net migration of ions and keeps the concentration of the solution constant,allowing for an accurate measurement of resistance.
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The equivalent conductances of two strong electrolytes at infinite dilution in $H_2O$ (where ions move freely through a solution) at $25^{\circ}C$ are given below:
$\lambda^{\infty}_{CH_3COONa} = 91.0 \ S \ cm^2 \ eq^{-1}$
$\lambda^{\infty}_{HCl} = 426.25 \ S \ cm^2 \ eq^{-1}$
What additional information/quantity is needed to calculate $\lambda^{\infty}$ of an aqueous solution of acetic acid?
$\lambda^{\infty}_{CH_3COONa} = 91.0 \ S \ cm^2 \ eq^{-1}$
$\lambda^{\infty}_{HCl} = 426.25 \ S \ cm^2 \ eq^{-1}$
What additional information/quantity is needed to calculate $\lambda^{\infty}$ of an aqueous solution of acetic acid?
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$(iii)$ As temperature increases,conductivity of $Cu$ decreases.
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$(ii)$ Conductivity of $Cu \propto$ temperature.
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