Degree of dissociation accurately defined

[Entanglement]

Is the degree of dissociation the value of

Alpha when the dissociation begins with 1 mole of the solute, or is it alpha when the solute is 1 mole at equilibrium,
There isn't a difference since I'm talking about very weak electrolytes but I want to know the accurate answer.

 

[Borek]

Degree of dissociation is a fraction of substance that dissociated, and it doesn't depend on the amount of substance dissolved.

 

[Entanglement]

Degree of dissociation is a fraction of substance that dissociated, and it doesn't depend on the amount of substance dissolved.

It's said on Wikipedia that is the value of dissociated moles per 1 mole,

It is meant one mole at equilibrium or when the dissociation begins with that 1 moles ?

 

[Borek]

I don't care about what wikipedia says. Degree of dissociation is a fraction of the substance that dissociated. You start with n moles, m moles dissociate, degree of dissociation is m/n.

 

[Entanglement]

I don't care about what wikipedia says. Degree of dissociation is a fraction of the substance that dissociated. You start with n moles, m moles dissociate, degree of dissociation is m/n.

Ok, m/n will give the value of m when n is 1, there's no contradiction

 

[Borek]

No contradiction, but a lousy thinking. Ratio doesn't require referring to the amount of substance.

 

[Entanglement]

No contradiction, but a lousy thinking. Ratio doesn't require referring to the amount of substance.

"n moles" is the number of moles at equilibrium or the number of moles that the dissociation starts with ?

 

[DrDu]

The degree of dissociation can be defined independently of equilibrium.
E.g., you could measure it as a function of time after bringing an undissociated substance into a solvent.

 

[Borek]

You start with n moles, m moles dissociate

"n moles" is the number of moles at equilibrium or the number of moles that the dissociation starts with ?

Perhaps it is time you start paying attention to what you read.

 

[Entanglement]

Perhaps it is time you start paying attention to what you read.

I'm sorry, thanks a lot for you help

 

[Entanglement]

I have a question about the ionic product of water

How is Kw = [ H ] [ OH ] = 10^-14 mole/ liter derived.

 

[Borek]

It is not derived, it is determined experimentally.

Please start new threads for new questions.