State and Explain Kohlrausch Law | Electrochemistry | Physical Chemistry
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- Опубликовано: 9 сен 2024
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Substances that allow the passage of current through them are called conductors and the phenomenon is called electrical conductance.
Conductance of a solution depends on the number of ions. It is observed that molar conductance increases upon dilution.
This may be due to the increase in the degree of dissociation of the electrolyte or due to decreased ion-ion force of attraction because as we dilute the solution distance between ions increases and at infinite dilution there is no attractive or repulsive forces between ions.
Therefore Kohlrauch law states that “At infinite dilution when all the inter ionic effects disappear, each ion makes a definite contribution towards the molar conductance of the electrolyte irrespective of the nature of the other ion with which it is associated.”
To calculate the molar conductance at infinite dilution (Λo) of weak electrolytes
To calculate the ionic conductance
To calculate the solubility of the sparingly soluble salt
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