Question

explain factors affecting degree of dissociation..?

Answer 1

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(i) At normal dilution, value of  is nearly 1 for strong electrolytes, while it is very less than 1 for weak electrolytes.

(ii) Higher the dielectric constant of a solvent more is its ionising power. Water is the most powerful ionising solvent as its dielectric constant is highest.

(iii)Dilution of solution directly proportional to   Amount of solvent

(iv) Degree of ionisation of an electrolyte in solution increases with rise in temperature.

(v) Presence of common ion: 

The degree of ionisation of an electrolyte decreases in the presence of a strong electrolyte having a common ion.

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Answer 2

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⚫THE DEGREE OF DISSOCIATION DEPENDS ON:--

◼Position of cation and anion in the electrochemical series.

➡Lower the position of ion greater is the tendency to be liberated.

◼Concentration of the ions in the electrolyte.

➡High the concentration of the ion greater the probability of it being discharged.

◼NATURE OF ELETRODES.

➡If the electrode is inert it don't take part in electrolytic reaction.

EXAMPLE :- Platinum, Iron, Gold etc.

➡If the electrode is active it takes part in the electrolytic reaction.

Example :-Copper, nickel, silver etc.

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