What is the kohlrausch law of independent migration of ions?
Kohlrausch’s law of independent migration of ions states that equivalent conductivity of an electrolyte is equal to the sum of conductance of anions and cations at infinite dilution. When the concentration of electrolyte approaches zero, molar conductivity is called limiting molar conductivity, Em∘.
What is kohlrausch’s law?
: a statement in physical chemistry: the migration of an ion at infinite dilution is dependent on the nature of the solvent and on the potential gradient but not on the other ions present.
What are the applications of Kohlroush’s law?
However, values for weak electrolytes can be determined by using the Kohlrausch’s equation. (ii) Determination of the degree of ionisation of a weak electrolyte: The Kohlrausch’s law can be used for determining the degree of ionisation of a weak electrolyte at any concentration.
Does kohlrausch law depend on nature of ion?
What is Kohlrausch Law? Thus, we can say it states that ‘conductivity of ions of an electrolyte at infinite dilution is constant and it does not depend on nature of co-ions.
What is the cell constant?
The cell constant is defined as the ratio of distance between the electrodes which is divided by the area of the cross-sectional of the electrode or we can say that the cell constant is defined as the ratio of distance between the conductance titration electrodes which is measured from the determination resistance of …
Why does conductivity decrease with dilution?
Conductivity changes with the concentration of the electrolyte. On dilution as volume of solution increases. Thus, the number of ions per ml decreases and hence conductivity decreases. Thus on dilution, ions get more apart and mobility of ions increases which leads to increase in molar conductivity of the solution.
What is Hittorf’s rule?
Hittorf studied such changes experimentally and gave a general rule known as the Hittorf’s Rule. It states that : the loss of concentration around any electrode is proportional to the speed of the ion moving away from it. Hittorf’s Rule may be illustrated by the following scheme.
What is C in Ostwald dilution law?
α = √K/C. (ii) Concentration of any ion = Cα = √CK = √K/V. K =dissociation constant of a weak acid. α = degree of dissociation. Ostwald’s dilution law states that only at infinite dilution the weak electrolyte undergoes complete ionization.
Which of the following is not essential for kohlrausch law?
Chemistry Question This discussion on Which statement is not correct for Kohlrausch law:a)The law is valid at infinite dilutionb)The law is valid for weak electrolytes onlyc)The basis of law is independent migrat ion of ionsd)None of these. Correct answer is option ‘B’.
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Which decreases with dilution?
specific conductance
The number of ions per cc decreases with dilution and therefore, specific conductance decreases with dilution.
What is the formula of cell constant?
Cell constant (k) is directly proportional to the distance separating the two conductive plates and inversely proportional to their surface area. K = L/a, where a(area) = A x B.
How is Kohlrausch’s law of independent migration of ions explained?
Kohlrausch’s law of independent migration of ions: At infinite dilution, each ion migrates independently of its co-ion and makes its own contribution to the total molar conductivity of an electrolyte irrespective of the nature of other ion with which it is associated. Thus, Λ0 = λ+0
Which is an application of the Kohlrausch law?
Some important applications of Kohlrausch law of independent migration of ions are: Kohlrausch law helps us in the determination of limiting molar conductivities for any electrolyte.
How is the Kohlrausch law related to molar conductivity?
Where λ o+ and λ o- are the limiting equivalent conductivities of cation and anion respectively. However the Kohlrausch law can also be stated in terms of molar conductivities as: The limiting molar conductivity of an electrolyte is the sum of individual contributions of limiting molar conductivities of its constituent ions. i.e.,
How does the migration of an ionic bond occur?
By simply changing the H 2 O partners they hydrogen-bond with, they can migrate “virtually”. In effect, what migrates is the hydrogen-bonds, rather than the physical masses of the ions themselves. This process is known as the Grothuss Mechanism.
