Formula of Kohlrausch law
Kohlrausch’s Law, also known as the Law of Independent Migration of Ions, states that at infinite dilution when dissociation is complete, each ion makes a definite contribution towards the equivalent conductance of the electrolyte. In other words, the equivalent conductivity of an electrolyte at infinite dilution is equal to the sum of the conductances of the individual ions. The law can be expressed as:
λ∞eq = λ∞c + λ∞a
where,
- λeq∞ is Molar Conductivity at infinite dilution
- λc∞ is Conductivity of the cation at infinite dilution
- λa∞ is Conductivity of the anion at infinite dilution
Kohlrausch’s Law is essential for calculating the limiting molar conductivity, degree of dissociation, and dissociation constant of weak electrolytes, as well as for determining the solubility of salts.
It is based on the concept that at infinite dilution when dissociation is complete, each ion makes a definite contribution towards the equivalent conductance of the electrolyte. The law is beneficial in studying dilute liquids and electrolyte solutions, as it allows for calculating the behavior of ions in such systems.
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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