SolutionHard
Question
The resistance of a solution ′A′ is 40 ohm and that of solution ′B′ is 70 ohm, both solutions being taken in the same conductivity cell. If equal volumes of solutions ′A′ and ′B′ are mixed, what will be the resistance of the mixture using the same cell ? (Assume that there is no increase in the degree of dissociation of ′A′ and ′B′ on mixing)
Options
A.50.9 ohm
B.101.8 ohm
C.110 ohm
D.55 ohm
Solution
For solu. ′A′ : K = 
= x(cell const.)
K1 =
× x
For solu. ′B′ : K2 =
× x
If equal vol. of solu. are mixed then vol. becomes doubled & conductivity of mix. becomes halved.
∴ Conductivity of the mix. will be
∴ for the mix. :
× x
R → Resistance of the mix.
= x(cell const.)K1 =
× x For solu. ′B′ : K2 =
× xIf equal vol. of solu. are mixed then vol. becomes doubled & conductivity of mix. becomes halved.
∴ Conductivity of the mix. will be
∴ for the mix. :
× xR → Resistance of the mix.
Create a free account to view solution
View Solution FreeMore Solution Questions
The molarity of H2SO4 solution, which has a density 1.84g/cc. at 35oC and contains 98% by weight, is...A liquid is in equilibrium with its vapours at its boiling point. On the average the molecules in the two phases have eq...Which of the following liquid pairs do not show positive deviation from Raoult’s law?...When during electrolysis of a solution of AgNO3 9650 coulombs of charge pass through the electroplating bath, the mass o...Barium ions, CN- and Co2+ form an ionic complex. If that complex is supposed to be 75% ionised in water with vant Hoff f...