.

Subsequently, one may also ask, what is the activity of a substance?

In chemical thermodynamics, activity (symbol a)is a measure of the “effective concentration” of aspecies in a mixture, in the sense that the species' chemicalpotential depends on the activity of a real solution in thesame way that it would depend on concentration for an idealsolution.

Subsequently, question is, what is activity and activity coefficient? Published on Nov 7, 2017. ACTIVITY IS THEEFFECTIVE CONCENTRATION OF THE SPECIES PRESENT IN THE SOLUTION ANDACTIVITY COEFFICIENT IS THE RATIO OF ACTIVITY ANDCONCENTRATION.

In this way, what is the units of equilibrium constant?

Therefore the unit for the equilibriumconstant is that of a concentration, in SI that would bemolm−3. It is derived from the Law of mass action; thederivation can be found on Wikipedia and various othersources.

Why is K Unitless?

Since activities are unitless, they eliminate theunits of all the quantities in the equilibrium constant expression,making the constant itself unitless all the time. Theactivity of a substance is a measure of the degree of presence of achemical, relative to a reference state.