2. Ch 4
• Electrolytes in solution - assume water unless told otherwise;
(dissolve)
• Strong: SS, SA, SB (one way arrow – completely dissociate)
• Weak – WA, WB (two way arrow – equilibrium, partially dissociate)
• Non- electrolytes (no recognizable ions)
• Polar and soluble (usually contain O, N, Cl or F atoms)
• nonpolar not soluble
Notes de l'éditeur
Water as a polar molecule -- +/- ends – uneven sharing of electrons
Water can hydrate ions and polar molecules – energy to separate more than made up by energy of attraction (release)
Non-polar substances – more energy involved to separate water and separate the np substance (especially water ) than is gained from the attraction
