CHAPTER 12 - CHAPTER 12: SOLUTIONS 12.1 THIRSTY SOLUTIONS:...

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CHAPTER 12: SOLUTIONS 12.1 THIRSTY SOLUTIONS: WHY YOU SHOULD NOT DRINK SEAWATER *Life of pi *Seawater actually draws water out of the body as it passes through the stomach and intestines diarrhea, further dehydration seawater= thirsty solution—draws more water to itself *Seawater: solution (homogeneous mixture of two or more substances) *solution—two components majority component = solvent (water) minority component = solute (NaCl) * unless its highly unfavorable energetically, subs ten to combine into uniform mixtures, not separate into pure subs *when barrier btwn pure water and NaCl solution is removed, spontaneous mixing occues, producing a solution of uniform concentration *seawater more concentrated solution than fluids in body cells when seawater flows through digestive tract, it draws out water from surrounding tissues extra fluid in the intestine = diarrhea decreased fluid in cells cause dehydration 12.2 TYPES OF SOLUTION AND SOLUBILITY *sol may be composed of solid and liq, or also gas and liq, two diff liq etcetc *Aqueous solution: water solvent, and a solid, liq, or gas as the solute *a particular solvent (i.e. water) does not dissolve all possible solutes *solubility: amt of the substance that will dissolve in a given amout of solvent NATURE’S TENDENCY TOWARD MIXING: ENTROPY *chemical sys lowers potential energy *formation of a solution does not necessarily lower the potential energy of its constituent particles i.e. formation of solution of 2 ideal gas (i.e. argon and neon) if barrier btwn the 2 removed, mix together and solution formed --because at low press and moderate temp they’re like ideal gases (don’t interact, no sig force btwn them) when they mix, thei PE remaines unchanged (not lowered) *can’t think of mixing of 2 ideal gases as lowering their PR *tendency to mix is related to a concept of ENTROPY entropy: mearsure of energy randomization/ energy dispersal in a sys *like b4, when Ar and Ne mixed, each gas (along with its kinetic energy) became spread out or dispersed over a larger volume greater energy dispersal or greater entropy than the separated components *tendency for all kinds of energy to spread out/disperse whenever it is not restrained reason that 2 ideal gases mix *another example: dispersal of energy from hot to cold
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THE EFFECT OF INTERMOLECULAR FORCES *absence of IMF two substances will spontaneously mix to form homo solution *but solids and liq exhibit a # of IMFs *depending on the exact nature of the forces in the solute and solvent, these forces may promote the formation of a solution or prevent it *IMF exists btwn each of the following -solvent, solute particles -solvent particles themselves -solute particles themselves * If. . -solvent-solute interaction > solvent-solute interaction = solution forms
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CHAPTER 12 - CHAPTER 12: SOLUTIONS 12.1 THIRSTY SOLUTIONS:...

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