8. A sample of black ink is made up of three pure dyes, A, B and C. Given that
A is the least soluble in ethanol and B is the most soluble. Show a
chromatogram that can be used to prove that the sample of black ink actually
contains the mentioned dyes.

The small bags of silica gel you often see in a new shoe box are placed there to control humidity. despite its name, silica gel is a solid. it is a chemically inert, highly porous, amorphous form of sio2. because water vapor readily adsorbs onto the surface of silica gel, it acts as a desiccant. despite not knowing mechanistic details of the adsorption of water onto silica gel, from the information provided you should be able to make an educated guess about the thermodynamic characteristics of the process. predict the signs for δg, δh, and δs for the adsorption of water.