Question

Why the conductivity of a tap water is less than the 0.1 N HCL Solution?

Answer 1

Electrical conductivity in the fluids is because of movement of charge carries and there density in the fluid.

Higher the concentration of free and ionized charge carrier better will be the conductivity.

=>In the HCl solution hydrogen ion [H+] and chloride [Cl-] ions are dissociates make the density of current carrier high in the solution.

HCl-------------> H+ + Cl- Kdissociation = [H+] [ Cl-] / [HCl]

While in the tap water the charge carrier density is low make it less conductive.

Kdissociation of tap water is low as compare to the  Kdissociation  of HCl.

That's why due to density of these charge carrier high in HCl the conductivity is higher than tap water