The pKa values of phosphoric acid are 2.15, 6.86 and 12.32. For the problems listed below, please ignore the volume contribution of any solid to the final volume of the solution (this is technically not correct, but the answer key will assume this is the case.) What will be the pH of solution if you add 1.00 mL of 1.00 M NaOH to 50.0 mL of phosphate buffer initially at pH 7.60

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.