9.1: Mixtures and Solutions Solutions form because a solute and a solvent experience similar intermolecular interactions. 9.2: The Solution Process When a solute dissolves, its individual particles are surrounded by solvent molecules and are separated from each other. 9.3: Solid Hydrates 9.4: Solubility 9.5: The Effect of Temperature on Solubility 9.6: The Effect of Pressure on Solubility - Henry’s Law 9.7: Units of Concentration Various concentration units are used to express the amounts of solute in a solution. Concentration units can be used as conversion factors in stoichiometry problems. New concentrations can be easily calculated if a solution is diluted. 9.8: Dilution 9.9: Ions in Solution - Electrolytes 9.10: Electrolytes in Body Fluids - Equivalents and Milliequivalents 9.11: Osmosis and Osmotic Pressure Certain properties of solutions differ from those of pure solvents in predictable ways. 9.12: Dialysis