Strictly speaking, the solvent is the component of a solution that is present in the largest amount on a mole basis. For solutions involving water, water is almost always the solvent because there tend to be many more water molecules present than molecules of any conceivable solute. To see why this is so, calculate the number of moles of water present in 1.0 L of water. Recall that the density of water is very nearly 1.0 g/mL under most conditions.
Essential Questions: o Stoichiometry - How much substance do I need or do I get Thermochemistry - How much energy do I need or do I get Kinetics - How fast does it go o Thermodynamics - To what extent does it happen Chemical change - the formation of one or more new chemical substances with a distinct composition or a change in the net amounts of some chemical species in a closed system are indications that a chemical process has occurred Reactants - the result of a chemical process, new chemical substances with different chemical compositions When chemical reactions occur in closed environments, the total mass of the system before and after the process remains constant (mass is conserved) Chemical process alw