The Jones Dole equation or Jones Dole expression describes the relationship between the viscosity of an aqueous salt solution and the concentration of salt within the solution (at a fixed temperature and pressure).
The Jones Dole equation is written as:
n
(
a
q
)
n
l
∗
(
l
)
=
1
+
A
C
1
2
+
B
C
where
n(aq) is the viscosity of the aqueous salt solution (at a fixed temperature and pressure)
nl*(l) is the viscosity of water at the same temperature and pressure
A is a coefficient that describes the impact of charge-charge interactions on the viscosity of a solution (it is usually positive)
C is the concentration of the salt
B is a coefficient which characterises the ion-solvent interactions at a defined temperature and pressure. It is interpreted as a measure of the structure forming and structure-breaking capacity of an ion in solution.
