What is Kohlrausch’s Law?
Kohlrausch Law, also known as Kohlrausch’s Law of Independent Migration of Ions, refers to an electrolyte’s limiting molar conductivity to its constituent ions. The law was proposed by Friedrich Kohlrausch in the late 19th century and is used to calculate the limiting molar conductivity, degree of dissociation, and dissociation constant of weak electrolytes. It is also used to measure the solubility of the salt.
For example, the limiting molar conductivity, of sodium chloride is determined when the limiting molar conductivities of sodium ion and chloride ion are given.
ΛoNaCl = ΛoNa+ + ΛoCl-
Statement of Kohlrausch law
Limiting molar conductivity of an Electrolyte equals the sum of the individual limiting molar conductivities of the cations and anions that make up the electrolyte.
Kohlrausch Law
Kohlrausch’s law, also known as the law of Independent migration of Ions, tells us that the total of the limiting molar conductance of cations and anions of an electrolyte is equal to the molar conductivity of that electrolyte. This law helps us study electrochemical cells and diluted liquids and is applicable in determining weak electrolytes’ molar conductivity.
In this article, we will learn the concepts of Kohlrausch law, its applications, etc. We have to study Kohlrausch Law in Class 12 for board exams.
Table of Content
- What is Kohlrausch’s Law?
- What is Molar Conductivity?
- Formula of Kohlrausch law
- Kohlrausch’s Law of Independent Migration
- Application of Kohlrausch’s Law
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