For a strong electrolyte, equivalent conductance increases slowly with dilution and can be expressed by the relationship : Λm=Λ∘m−A√c. Which electrolyte(s) have same value of A ?
A
NaCl
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B
CaCl2
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C
ZnCl2
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D
MgSO4
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Solution
The correct options are ACaCl2 CZnCl2 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.
Λm=Λ∘m−A√c
A depends on the type (magnitude of charge on cation and anion) of electrolyte for a given temperature of solvent.