Posted by lisa on Monday, September 13, 2010 at 11:43pm.
the freezing point of ethanol (C2H5OH) is 114.6C. the molal freezing point depression constant for ethanol is 2.00C/m. what is the freezing point (C) of a solution prepared by dissolving 50.0 g of glycerin (C3H8O3, A nonelectrolyte) in 200 g of ethanol.
any help would be appreciated im very confused.

molal  DrBob222, Tuesday, September 14, 2010 at 12:02am
moles glycerin = grams/molar mass
solve for moles glycerin.
molality = mole/kg solvent
solve for molality
delta T = K*m
solve for delta T, then freezing point.

molal  lisa, Wednesday, September 15, 2010 at 7:21pm
thank you looks like i double posted... sorry

molal  lisa, Wednesday, September 15, 2010 at 7:42pm
i tried to solve it on my own but im confused about the last part, this i what i have so far..
moles of glycerin= 50.0/92.10=0.54
molality=0.54/0.200=2.7
is that right?
im a little confused about the numbers im supposed to use for step 3...
Answer This Question
Related Questions
 molal  the freezing point of ethanol (C2H5OH) is 114.6C. the molal freezing ...
 molal  the freezing point of ethanol (C2H5OH) is 114.6C. the molal freezing ...
 molal  the freezing point of ethanol (C2H5OH) is 114.6C. the molal freezing ...
 molal (again)  i tried to solve it on my own but im confused about the last ...
 Chemistry  The freezing point of ethanol is 114.6 C and its Kf value is 2.00 C...
 Chemistry  The freezing point of ethanol is 114.6 deg Celsius and its Kf value...
 chemistry  1. Find the molality of the solution prepared by dissolving 0.238g ...
 Chemistry  If the freezing point of pure toluene is 95.15 oC and its freezing ...
 chem  What is the freezing point (°C) of a solution prepared by dissolving 11....
 chemistry  Calculate the freezing point of 0.15 m calcium chloride aqueous ...
More Related Questions