Suppose you prepare a buffer by adding 0.157 mol of NaH2PO4 and 0.966 mol of Na2HPO4 to 1.0 L of water. What is the pH of the solution?

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer

Calculate the mass of carbon in 97.0 g of sucrose c12h22o11

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.