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