It is used to calculate the dissociation fixed of an electrolyte. Acid dissociation fixed \[K_\] can be calculated by Kohlrausch’s legislation. It is an announcement is angela and diamond together bgc in bodily chemistry that’s outlined because the the migration of an ion at infinite dilution that’s depending on the nature of the solvent .
Kohlrausch law and its applications are very important in the research of dilute solutions and in addition within the research of electrochemical cells. This legislation is especially used to search out the limiting conductivity of a weak electrolyte, amongst different necessary purposes. For weak electrolytes, the whole molar focus is decided using Kohlrausch’s law. It is as a result of, in weak electrolytes such as Acetic Acid, at greater concentrations, the diploma of dissociation may be very low. Apply Kohlrausch legislation of independent migration of ions, write the expression to find out the limiting molar conductivity of calcium chloride.
Where μo+ and μo- are the limiting molar conductivities of cation and anion respectively. The molar conductivity will increase with lower in concentration both, for weak and powerful electrolytes. When a cation is the same in both the electrolytes, then the difference in the molar conductivity of the 2 electrolytes does not depend upon the cation and is only dependent on the change that happens in their anions.
Limiting equivalent molar conductivity of an electrolyte is the algebraic sum of limiting molar equivalent conductivities of its constituent ions. It is used to calculate the diploma of dissociation of weak electrolyte at a specific concentration. The equal conductivity of an electrolyte at infinite dilution is the sum of two values on depending upon the cation and the opposite upon the anion.
Kohlrausch law helps in figuring out the limiting molar conductivities for any sort of electrolyte . Weak electrolytes consist of lower degree of dissociation and decrease molar conductivities at high concentrations. As already seen in graph that for weak electrolyte, the line isn’t straight between c1/2 and molar conductivity; where c is concentration. Weak electrolyte’s molar conductivity will increase quickly at lowered concentrations. Thus, the limiting molar conductivity, Ëm° can’t be achieved by molar conducitvity’s extrapolation to ‘0’ cncentration.
