Question:
When an aqueous solution of an electrolyte is progressively diluted by adding more solvent water, how do its Specific Conductivity (\( \kappa \)) and Molar Conductivity (\( \Lambda_m \)) respond?
When an aqueous solution of an electrolyte is progressively diluted by adding more solvent water, how do its Specific Conductivity (\( \kappa \)) and Molar Conductivity (\( \Lambda_m \)) respond?
Show Hint
Keep this clear rule memorized: dilution increases molar conductivity (\(\Lambda_m\)) due to increased ion mobility and dissociation, but decreases specific conductivity (\(\kappa\)) because ion density per unit volume drops.
Updated On: May 25, 2026
- Both Specific Conductivity (\( \kappa \)) and Molar Conductivity (\( \Lambda_m \)) increase uniformly.
- Both Specific Conductivity (\( \kappa \)) and Molar Conductivity (\( \Lambda_m \)) decrease uniformly.
- Specific Conductivity (\( \kappa \)) increases, while Molar Conductivity (\( \Lambda_m \)) decreases.
- Specific Conductivity (\( \kappa \)) decreases, while Molar Conductivity (\( \Lambda_m \)) increases.
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Concept:
The electrical conductivity profiles of an electrolytic solution depend on the concentration of ions present per unit volume, as well as the total mobility of those ions within the solvent matrix.
Step 1: Evaluate the behavior of Specific Conductivity (\(\kappa\)) upon dilution.
Specific conductivity (\(\kappa\)) is defined as the conductance of exactly a one-centimeter cube unit volume of a solution. When a solution is diluted, the total number of current-carrying ions per unit volume decreases steadily. As a direct result, Specific Conductivity (\(\kappa\)) always decreases with dilution for both strong and weak electrolytes.
Step 2: Evaluate the behavior of Molar Conductivity (\(\Lambda_m\)) upon dilution.
Molar conductivity (\(\Lambda_m = \frac{\kappa}{C}\)) is the conducting power of all the ions produced by dissolving one mole of an electrolyte. Upon dilution, the concentration (\(C\)) decreases. For strong electrolytes, interionic attractions decrease, allowing ions to move more freely. For weak electrolytes, the degree of dissociation (\(\alpha\)) increases sharply, generating a larger number of total ions. Consequently, Molar Conductivity (\(\Lambda_m\)) always increases with dilution.
Step 1: Evaluate the behavior of Specific Conductivity (\(\kappa\)) upon dilution.
Specific conductivity (\(\kappa\)) is defined as the conductance of exactly a one-centimeter cube unit volume of a solution. When a solution is diluted, the total number of current-carrying ions per unit volume decreases steadily. As a direct result, Specific Conductivity (\(\kappa\)) always decreases with dilution for both strong and weak electrolytes.
Step 2: Evaluate the behavior of Molar Conductivity (\(\Lambda_m\)) upon dilution.
Molar conductivity (\(\Lambda_m = \frac{\kappa}{C}\)) is the conducting power of all the ions produced by dissolving one mole of an electrolyte. Upon dilution, the concentration (\(C\)) decreases. For strong electrolytes, interionic attractions decrease, allowing ions to move more freely. For weak electrolytes, the degree of dissociation (\(\alpha\)) increases sharply, generating a larger number of total ions. Consequently, Molar Conductivity (\(\Lambda_m\)) always increases with dilution.
Was this answer helpful?
0
0
Top CUET Chemistry Questions
Among the following statements, choose the correct statements.
A. In Ionic solid, ions are the constituent particles.B. Ionic solids are soft.C. Ionic solid are electrical insulators in the solid state.D. Ionic solid conduct electricity in molten state.E. Ionic solid have low melting and boiling points.Choose the correct answer from the options given below:
Atoms of element B form hcp lattice and those of the element A occupy 2/3 rd of tetrahedral voids. What is the formula of the compound formed by the elements A and B?
- Consider the 1M aqueous solution of the following compounds and arrange than in the increasing order of elevation in the boiling points.
A. $C_6H_{12}O_6$
B. $NaCl $
C. $MgCl_2 $
D. $AlCl_3$
E. $Al_2(SO_4)_3 $
Choose the correct answer from the options given below: - Calculate the molarity of a solution containing 5g of NaOH in 450 mL solution .
Among the following statements related to ionic conductance. choose the correct statements.
A. Ionic conductance depends on the nature of electrolyteB. Ionic conductance is due to the movements of electronsC. Ionic conductance is also called electronic conductanceD. Ionic conductance depends on temperatureE. Ionic conductance also depends on the nature of solvent.Choose the correct answer from the options given below:
View More Questions
Top CUET Conductance of Electrolytic Solutions Questions
- Dissociation constant and molar conductance of acetic acid are $1.78\times10^{-5}~mol~L^{-1}$ and $48.15~S~cm^{2}~mol^{-1}$. Conductivity is:
- Which of the following expression correctly represents molar conductivity?
- Which of the following expression correctly represents molar conductivity?
- Which of the following expression correctly represents molar conductivity?
- Which of the following expression correctly represents molar conductivity?
View More Questions
Top CUET Questions
Select the statements that are CORRECT regarding patterns of biodiversity.
(A) Species diversity increases as we move away from the equator towards the poles(B) The tropical Amazon rain forest in South America has the greatest biodiversity on earth.(C) There is more solar energy available in the temperate region than tropics.(D) Tropical environments are less seasonal relatively more constant and predictableWhich of the following hormone is not produced by placenta ?
- Individuals with karyotype of 44+XXY having overall masculine development with few feminine development like Gynaecomastia has _______ chromosomal disorder.
- Match List - I with List - II.Choose the correct answer from the options given below :
List - I
List - II
A Streptokinase I Blood-Cholestrol lowering agents B Cyclosporin II Clot Buster C Statins III Propionibacterium sharmanii D Swiss Cheese IV Immuno suppressive agent Which of the following option determines percolation and water holding capacity of soils ?
View More Questions