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21 Cards in this Set
- Front
- Back
homogenous sys
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soln
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saturated solns
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at given temp and pressure contain the max amt of solute that can be accomodated by solvent
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nonelectrolytes
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-subs that do not form ions when dissolved in water
- aqueous soln do not conduct electric current |
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ex of non electrolytes
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estradiol
glycerin urea sucrose |
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electrolytes
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form ions in soln
aq soln conduct electric current |
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ex of electrolytes
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NaCl
HCl atropine |
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strong electrolytes
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completely ionized in water at all conc
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ex of strong electrolytes
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NaCl
HCl |
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weak electrolytes
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partially ionized in water
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ex of weak electrolytes
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asa
atropine |
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colligative properties of a soln
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dependent on total # of ionic and nonionic solute molecules in the soln
dependent on ionization but independent of other chemical prop of the solute |
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colligative prop
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1. lowering of vapor pressure
2. elevation of boiling pt 3. depression of freezing pt 4. osmotic pressure |
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raoult's law
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partial vapor pressure of each volatile component in a soln = prodt of mol fraction of the component in the soln and the vapore pressure of the pure component
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vapor pressure
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temp dependent but independent of the amt of liq and vapor
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boiling pt
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temp at w/c vapor pressure of liq = an external pressure of 760mm Hg
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higher boilingpt
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xoln of a nonvolatile solute than pure solvent (bec solute lowers vp of solvent)
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osmosis
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process @ w/c solvent molecules pass through a semipermeable membrane fr a region of dilute soln to one of the more conc soln
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semipermeable membtrane
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barrier through w/c only solvent molecules may pass
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solvent molecules in conc soln
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lower chemical potential than solvent molecules in a more dilute soln
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osmotic pressure
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pressure must be applied to the soln to prevent the flow of pure solvent into the conc soln
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van hoff's equation
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osmotic pressure as a fxn of the # of moles of solute h2 in the soln of vol
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