Question

hlo guys...
what's the formula to find the degree of dissociation? ​

Answer 1

Let us first define the terms needed here.

Degree of dissociation (DOD)

Degree of dissociation is the fraction of a mole of the reactant that underwent dissociation. It is represented by αα.

α=amount of substance of the reactant dissociatedamount of substance of the reactant present initiallyα=amount of substance of the reactant dissociatedamount of substance of the reactant present initially

Number of moles dissociated

It is defined as the product of the initial concentration of the reactant and the degree of dissociation

Now suppose you have a reaction like this

A⟶B+CA⟶B+C

The initial state of A is always the concentration of A (should be given in the question) while initial moles of B and C are zero (if anything else is not specified). The final state of A is always defined as (amount of substance initially present) - (amount of substance dissociated)(amount of substance initially present) - (amount of substance dissociated) while for B and C it is just amount of substance of A dissociated)amount of substance of A dissociated).

Writing our equation again,

Initial amount of substanceFinal amount of substanceAaa−a⋅(DOD)⟶B0a⋅(DOD)+C0a⋅(DOD)

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