Chemistry in Mixture Model Interface

Hi,

I have a simple model in which I am simulating sedimentation using the mixture model interface turbulent in a pipe. I am using solids dispersed in liquid. I input the solids volume fraction, particle size, solid and liquid densities. I want to know how to add chemistry to the solids.

For instance lets say I have 3% solids dispersed in liquid. How to define that the 3% solids have certain chemical concentrations, they react and form precipitate and settle in the pipe.

Is it possible in COMSOL to do it?

Thanks,
Romani