What do we mean by cell constant in conductivity measurements. If the resistance of a conductivity cell filled with 0.02 M KCl solution is 520 Ω, calculate its cell constant, given κ = 0.248 Sm-1...
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Answer:
Resistance=
Specific conductivity
1
×
A
l
Cell constant=
A
l
=1.29cm
−1
R=520ohms
Conductivity or specific conductivity=
Resistance
Cell constant
=
520
1.29
=0.00248mho/cm
Molar conductivity=
Molarity
1000×conductivity
=
0.02
1000×0.00248
=124Scm
2
mol
−1
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