Chapter 13 solutions and other mixtures key ideas interaction among chemical entities of different type leads to mixtures most really interesting systems are mixtures. Concentration units tell us quantitively the amount of solute dissolved molarity m molofsolutele of solvent molarity m molofsolute. Kg of solvent mole fraction x of solute molofsolutetotal moles mole fraction x of solvent molofsolvent total. X solute t solvent weight i massofsolutee x 100 total mass. Concentration units parts per million ppm and parts per billion ppb ppm ppb mg. Clos ee favored or not e bi ly w. Sh solute t solvent b for endothermic solution 1 ah b for exothermic t enthalpychange. Entropy change not favored 0any favored at low temperature temperature tdisfavored. Mixture of two liquids if two liquids mix they are called miscible if two liquids donot mix they are called immiscible whether or not two liquids are miscibledepends on both entropy and enthalpy.
