Which absorbance wavelength is responsible for the observed purple color? 2) What purpose does the base serve in this reaction? What is the name of the intermediate that it generates? Can this reaction proceed without adding base? 3) Suppose instead of using dibenzylacetone we used benzophenone. Would this reaction work? Why or why not. 4) This reaction was carried out in ethanol. Provide a specific reason why this experiment would not work well if carried out in hexanes.

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.