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System, Surroundings, Intensive, Extensive Properties

The conductiv...

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The conductivity of 0.04 M KCl solution is 0.248 × 10–2 S cm–1. If the resistance of this solution is 600 Ω, then molar conductivity is

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Q. A conductivity cell filled with

0.01 M

K C l

25^{o} C

the resistance of

604 o h m s

. The conductivity of

K C l

25^{o} C

0.00141 Ω^{- 1} {c m}^{- 1}

. The same cell filled with

0.001 M

A g {N O}_{3}

gives a resistance of

6529 o h m s

. Calculate the molar conductivity of

0.001 M

A g {N O}_{3}

25^{o} C

Q. (A) Define the following terms:
(i) Limiting molar conductivity
(ii) Fuel cell
(B) Resistance of a conductivity cell filled with

0.1 m o l L^{- 1} K C l

100 Ω

. If the resistance of the same cell when filled with

0.02 m o l L^{- 1} K C l

540 Ω

, calculate the conductivity and molar conductivity of

0.02 m o l L^{- 1} K C l

solution. The conductivity of

0.1 m o l L^{- 1} K C l

1.29 \times 10^{- 2} Ω^{- 1} {c m}^{- 1}

Q. The resistance of a conductivity cell filled with a solution of an electrolyte of concentration 0.1 M is

100 Ω

. The conductivity of this solution is

1.29 S m^{- 1}

. The resistance of the same cell, when filled with 0.02 M of the same solution, is

520 Ω

. The molar conductivity of 0.02 M solution of the electrolyte will be: (Take

\frac{129}{520} = 0.248

Q. (a) Define molar conductivity of a solution and explain how molar conductivity changes which change in concentration of solution for a weak and a strong electrolyte?

(b) The resistance of a conductivity cell containing

0.001 M

KCl solution at

298

1500

Ω

. What is the cell constant if the conductivity of

0.001

M KCl solution at 298 K is

0.146 \times 10^{- 3} S c m^{- 1}

Q. Resistance of a conductivity cell filled with 0 02 M KCl solution is 520 ohms. Calculate the conductivity and molar conductivity of that solution.[Cell constant of the cell=1.29

c m^{- 1}

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