Consider a solution which is 0.10M in NH3 and 0.20M in NH4Cl. Choose ALL of the following that are true. If NaOH is added, the OH- ions react with the NH3. If HCl is added, the H+ ions react with the NH3. If a small amount of NaOH is added, the pH becomes slightly more basic. If NH4NO3 is added, the pH becomes more basic. If a small amount of HCl is added, the pH becomes slightly more basic.

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.