Discuss the construction and uses of a conductivity cell.
(N/A) conductivity cell is an instrument used to measure the ionic conductivity or resistivity of an electrolytic solution.
It is available in several designs,and two simple ones are shown in the diagram.
Construction: Basically,it consists of two platinum electrodes coated with platinum black (finely divided metallic $Pt$ is deposited on the electrodes electrochemically).
These electrodes have an area of cross-section equal to $A$ and are separated by a distance $l$.
Therefore,the solution confined between these electrodes acts as a column of length $l$ and area of cross-section $A$.
Uses: By using a conductivity cell,the conductivity and resistivity of an unknown electrolytic solution can be measured.
It is available in several designs,and two simple ones are shown in the diagram.
Construction: Basically,it consists of two platinum electrodes coated with platinum black (finely divided metallic $Pt$ is deposited on the electrodes electrochemically).
These electrodes have an area of cross-section equal to $A$ and are separated by a distance $l$.
Therefore,the solution confined between these electrodes acts as a column of length $l$ and area of cross-section $A$.
Uses: By using a conductivity cell,the conductivity and resistivity of an unknown electrolytic solution can be measured.
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At $298 \ K$,the conductivity of $KCl$ solutions of molarity $0.1 \ M, 0.01 \ M$ and $1.0 \ M$ are recorded as $X, Y$ and $Z \ S \ cm^{-1}$ respectively. The correct relation between $X, Y$ and $Z$ is
The molar conductivity is maximum for the solution of concentration (in $M$)
MediumKCET 2022
View SolutionGiven below are two statements $:$
Statement $I :$ Mohr's salt is composed of only three types of ions$-$ferrous,ammonium and sulphate.
Statement $II :$ If the molar conductance at infinite dilution of ferrous,ammonium and sulphate ions are $x_1, x_2$ and $x_3 \ S \ cm^2 \ mol^{-1}$,respectively then the molar conductance for Mohr's salt solution at infinite dilution would be given by $x_1+x_2+2 x_3$
In the light of the given statements,choose the correct answer from the options given below $:$
Statement $I :$ Mohr's salt is composed of only three types of ions$-$ferrous,ammonium and sulphate.
Statement $II :$ If the molar conductance at infinite dilution of ferrous,ammonium and sulphate ions are $x_1, x_2$ and $x_3 \ S \ cm^2 \ mol^{-1}$,respectively then the molar conductance for Mohr's salt solution at infinite dilution would be given by $x_1+x_2+2 x_3$
In the light of the given statements,choose the correct answer from the options given below $:$
Which of the following cannot be used as a standard solution for the determination of the cell constant of a conductivity cell?
The equivalent conductivities of $Al^{3+}$ and $SO_4^{2-}$ ions at infinite dilution are $189$ and $160 \ \Omega^{-1} cm^2 eq^{-1}$ respectively. What is the equivalent conductivity of $Al_2(SO_4)_3$ at infinite dilution?
Difficult
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