Question

# For a strong electrolyte, equivalent conductance increases slowly with dilution and can be expressed by the relationship : $$\Lambda_{m}\, =\, \Lambda^{\circ}_{m}\, -\, A\sqrt{c}$$.  Which electrolyte(s) have same value of A ?

A
NaCl
B
CaCl2
C
ZnCl2
D
MgSO4

Solution

## The correct options are A $$CaCl_{2}$$ C $$ZnCl_{2}$$Effect of Concentration on Equivalent Conductance:The variation of equivalent conductance  or molar conductance with the concentration of the electrolyte is generally expressed graphically, as follows: It is a straight line with negative slope.$$\Lambda_{m}\, =\, \Lambda^{\circ}_{m}\, -\, A\sqrt{c}$$A depends on the type (magnitude of charge on cation and anion) of electrolyte for a given temperature of solvent.Chemistry

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