Question

Write Kohlrausch law for molar conductance of Al2(SO4)3​

Answer 1

Answer. Kohlrausch's law states that the equivalent conductivity of an electrolyte at infinite dilution is equal to the sum of the conductances of the anions and cations. If a salt is dissolved in water, the conductivity of the solution is the sum of the conductances of the anions and cations

Answer 2

Answer: The equation for Kohlrausch law is written below

Explanation:

Kohlrausch law of limiting molar conductivity is defined as the sum of the limiting ionic conductivities of the cation and the anion each multiplied with the number of ions present in one formula unit of the electrolyte.

Mathematically,

$\Lambda^o_m\text{ for }A_xB_y=x\lambda^o_++y\lambda^o_-$

The ionization equation for aluminium sulfate follows the equation:

$Al_2(SO_4)_3​\rightarrow 2Al^{3+}+2SO_4^{2-}$

The equation for the Kohlrausch law of the given electrolyte follows:

$\Lambda^o_m\text{ for }Al_2(SO_4)_3=2\lambda^o_{A(l^{3+})}+3\lambda^o_{(SO_4{3-})}$

Hence, the equation for Kohlrausch law is written above