posted by Kelsey on .
I need help ASAP!
Ethylene glycol (C2H6O2) is the principal ingredient in antifreeze. How many grams of ethylene glycol will be needed to lower the freezing point of 2100 grams of water by 20 degrees celcius?
delta T = Kf*m
Solve for m = molality
m = mols/kg solvent
You have m and kg solvent; solve for mols.
mols = grams/molar mass
You have mol and molar mass, solve for grams.
Note the correct spelling of celsius.