Conductance in Electrolytic Solutions

IMPORTANT

Conductance in Electrolytic Solutions: Overview

This Topic covers sub-topics such as Molar Conductivity, Conductivity Cell, Equivalent Conductivity, Relation between Molar Conductivity and Equivalent Conductivity, Wheatstone Bridge for Resistance Measurement and, Effect of Dilution on Molar Conductivity

Important Questions on Conductance in Electrolytic Solutions

MEDIUM
IMPORTANT

The relation among the cell constant, the resistance of the solution in the cell and the conductivity of the solution is

EASY
IMPORTANT

The molar conductivity of a 1.5 M solution of an electrolyte is found to be 138.9 S   c m 2   mo l 1 .  Calculate the conductivity of the solution.

MEDIUM
IMPORTANT

The molar conductivity of a 1.5 M solution of an electrolyte is found to be 138.9 S cm2 mol-1. Calculate the conductivity of the solution?

EASY
IMPORTANT

The relationship between the conductivity and the molar conductivity of a solution can be expressed as:

EASY
IMPORTANT

The resistance of a conductivity cell containing 0.001 M KCI solution at 298 K is 1500   Ω.  The cell constant would be (if the conductivity of 0.001 M KCI solution at 298 K is   0.146× 10 3 S cm 1  ):  

MEDIUM
IMPORTANT

How does the conductivity of a solution of acetic acid will vary if a solution of sodium hydroxide is added?

EASY
IMPORTANT

How does the conductivity of a solution of acetic acid will vary if a solution of sodium hydroxide is added?

EASY
IMPORTANT

The conductivity of centimolar solution of KCl at 25°C is 0.0210 ohm-1 cm-1 and the resistance of the cell containing the solution at 25°C is 60 ohm. The value of cell constant is

HARD
IMPORTANT

The specific conductance of 0.0025M acetic acid is 5×10-5 S cm-1 at a certain temperature. The dissociation constant of acetic acid is ___________ ×10-7.(Nearest integer)

Consider limiting molar conductivity of CH3COOH as 400 S cm2 mol-1

MEDIUM
IMPORTANT

The number of correct statements from the following is ___________

(A) Conductivity always decreases with decrease in concentration for both strong and weak electrolytes.

(B) The number of ions per unit volume that carry current in a solution increases on dilution.

(C) Molar conductivity increases with decrease in concentration.

(D) The variation in molar conductivity is different for strong and weak electrolytes.

(E) For weak electrolytes, the change in molar conductivity with dilution is due to decrease in degree of dissociation.

HARD
IMPORTANT

How many of the following statements are correct :
1. Conductivity decreases with increase in dilution, for both strong and weak electrolyte.
2. Molar conductivity increases with increase in dilution for both strong and weak electrolyte.
3. Molar conductivity increases with increase in 'α' for weak electrolyte.
4. Change in molar conductivity is same for both strong and weak electrolyte with increase in dilution.

HARD
IMPORTANT

Draw a well labelled diagram for testing the conductivity of salt solution.

MEDIUM
IMPORTANT

What is specific conductance of a solution ? How it varies with dilution?

HARD
IMPORTANT

Why the electrical conductivity of the solution produced by adding little sulphuric acid into pure water is more than the electrical conductivity of pure water?

MEDIUM
IMPORTANT

Equal volumes of 0.015 M CH3COOH & 0.015 M NaOH are mixed together. What would be the molar conductivity of mixture if conductivity of CH3COONa is 6.3×10-4 S cm-1

HARD
IMPORTANT

A weak monobasic acid HA is 3% dissociated in 0.02M solution. The limiting molar conductivity at infinite dilution is 6.5×10-2 S cm2 mol-1. The molar conductivity of 0.5M solution of this acid is

MEDIUM
IMPORTANT

0.2 M H2SO4 solution is diluted to 0.02 M H2SO4. Hence, the molar conductivity will be

MEDIUM
IMPORTANT

Specific conductance of 0.1M HNO3 is 6.3×10-2 ohm-1 cm-1. The molar conductance of the solution is

EASY
IMPORTANT

The molar conductivity is maximum for the solution of concentration

HARD
IMPORTANT

A potential difference of 20 V applied to the ends of a column of N10 AgNO3 solution, 4 cm in diameter and 12 cm in length gives a current of 1.198 amperes. Calculate the specific and equivalent conductivity of the solution.