Nader AbdlGhani said:What's the unit used to measure α ? if α=(Kd/C)0.5 where Kd is the dissociation constant and C is the total concentration of electrolyte .
I've already done that , but before I did so , my teacher had told me it's unit-less , he said that according to our school textbook , according to this idea , concentration is measured in mol/Litre and Kd doesn't have a unit as it's a ratio between two constants , therefore the unit of measuring alpha should be Litre/mol ,which sounds a little bit weirdBorek said:Why don't you plug units into the formula and see what you get? What is the unit of the concentration? What is the unit of Kd?
Nader AbdlGhani said:Kd doesn't have a unit
I'm sorry but what formula you want me to write ? and what do you mean the formula for alpha looks odd ? thanks .Borek said:Sure it does. Please write the formula.
Besides, I just realized your formula for α looks odd.
If ##\mathbf{AB \leftrightarrow A^+ + B^-}## then ##\mathbf{K_d=\frac{[A^+][B^-]}{[AB]}}##Borek said:Write the formula for Kd, to see what are Kd units.
α is just the dissociation percentage (fraction), I don't see how it can be calculated using formula you gave in the opening post.
The unit of measurement for degree of dissociation (α) is a dimensionless quantity, as it is a ratio of the number of dissociated molecules to the initial number of molecules in a substance.
In equations, the degree of dissociation is typically represented by the Greek letter alpha (α) or the symbol ξ (xi).
No, the degree of dissociation cannot be greater than 1. It is a measure of the extent to which a substance has dissociated, and a value of 1 would mean that all the molecules in the substance have dissociated.
Temperature can affect the degree of dissociation as it can alter the equilibrium between the dissociated and undissociated molecules. Generally, an increase in temperature leads to an increase in degree of dissociation for endothermic reactions, and a decrease in degree of dissociation for exothermic reactions.
The degree of dissociation is important in understanding the behavior of chemical reactions. It can indicate the strength of bonds in a substance, as well as the equilibrium between reactants and products. It is also used in calculating equilibrium constants and in predicting the direction of a reaction.