Question

State Ostwall's dilution law

Answer 1

OSTWALD'S DILUTION LAW..

Ostwald's Dilution Law tells us that the equilibrium constant, and the initial concentration of an electrolyte (prior to dissociation or association), can be used to calculate the extent of this dissociation or association for the electrolyte.




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Answer 2

HEY FOLK...

An expression for the degree of dissociation of a weak electrolyte.

                                         HA ⇌ H+ + A−

 the dissociation constant K a is given by

 Ka = α² n/(1 – α)V 

where α - the degree of dissociation,

n - initial amount of substance  

V - volume. 

If α is small compared with 1, then α² = KV/n; i.e. the degree of dissociation is proportional to the square root of the dilution. The law was first put forward by Wilhelm Ostwald to account for electrical conductivities of electrolyte solutions.

HA⇌H+ + A−

Ka = α² n/(1 – α)V

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