Crack this if u can A cell whose resistance when filled with 0 1 M kcl is 200 ohm, - Chemistry - Electrochemistry

Question

Crack this if u can
A cell whose resistance when filled with 0 1 M kcl is 200 ohm,
is measured to be 6400 ohm, when filled with 0 003M nacl solution
All measurements are at 298 K what is the equivalent conductance of
nacl solution

Anuradha Puri · Accepted Answer

Specific conductance of 0 1 KCl solution at 298 K= 1 2886
ohm-1cm-1
Now,
specific conductance = cell constant x conductance
cell constant = 1 2886 x resistance (since; conductance =
1/resistance)
= 1 2886 x 200
= 257 72 cm-1
For NaCl solution, specific conductance = cell constant x
conductance
= 257 72 x 1/6400
= 0 040 ohm-1cm-1
molar conductance = specific conductance/ concentration
= 0 040/ 0 003
= 13 33 ohm-1 cm2 mol-1
Now,
Molar conductance /equivalent conductance = molar mass of
electrolyte/equivalent mass of electrolyte
13 33/ equivalent conductance = molar mass of NaCl/equivalent mass
of NaCl
= 58 5/58 5
=1
Equivalent conductance = 13 33/1
=13 33 ohm-1 cm2 equiv-1

Crack this if u can. A cell whose resistance when filled with 0.1 M kcl is 200 ohm, is measured to be 6400 ohm, when filled with 0.003M nacl solution. All measurements are at 298 K. what is the equivalent conductance of nacl solution.

Crack this if u can.

A cell whose resistance when filled with 0.1 M kcl is 200 ohm, is measured to be 6400 ohm, when filled with 0.003M nacl solution. All measurements are at 298 K. what is the equivalent conductance of nacl solution.