State Kohlrausch law of independent migration of ions. Why does the conductivity of a solution decrease with dilution ?
Kohlrausch law of independent migration of ions :
The law states that limiting molar conductivity of an electrolyte can be represented by the sum of the individual contributions of the anion and cation of the electrolyte.
On dilution, the conductivity (k) of the electrolyte decreases as the number of ions per unit volume of solution decreases.
The law states that limiting molar conductivity of an electrolyte can be represented by the sum of the individual contributions of the anion and cation of the electrolyte.
On dilution, the conductivity (k) of the electrolyte decreases as the number of ions per unit volume of solution decreases.
The conductivity of metals decreases while that of electrolytes increases with increase in temperature. Why?
The conductivity of 0.20 M solution of KCl at 298 K is 0.025 Scm⁻¹. Calculate its molar conductivity.
The potential of a hydrogen electrode at pH = 10 is
a. 0.591 V
b. 0.00 V
c. – 0.591 V
d. -0.059 V
Calculate pH of following half-cell. Pt, \(H_2\) / \(H_2\)\(SO_4\) , if its electrode potential is 0.03V.
The electrical resistance of a column of 0.05 M KOH solution of diameter 1 cm and length 45.5 cm is 4.55 × 10³ ohm. Calculate its molar conductivity.
Define the following terms :
(i) Fuel cell
(ii) Limiting molar conductivity
Calculate the molality of ethanol solution in which the mole fraction of water is 0.88.
What is meant by rate of a reaction ? Differentiate between average rate and instantaneous rate of a reaction.
What are colligative properties? Write the colligative property which is used to find the molecular mass of macromolecules.
Calculate pH of following half-cell. Pt, \(H_2\) / \(H_2\)\(SO_4\) , if its electrode potential is 0.03V.
What is meant by ‘disproportionation’ ? Give an example of a disproportionation reaction in aqueous solution.