How insoluble particles affect the solutions' conductivity: a theory and the test in NaCl and chitosan solutions

In this study, we formalize a theory about how insoluble particles in the solution affect the solution electrical conductivity. We propose four corollaries of this theory: (1) the conductivity change is the same as long as the concentration of particles exceeds a certain value; (2) the solution conductivity is irrelevant to the particle size; (3) the increasing temperature weakens the particles' effect on solution conductivity; (4) the heavier the ions in solutions are, the larger the conductivity change caused by particles is. We then prove these four corollaries to be right by experiments in two solution systems, NaCl + CaCO(3) and chitosan + nHAC (nanohydroxyapatite/collagen composite).