Freezing point equation. 10 points
Favorites|Homepage
Subscriptions | sitemap
HOME > Chemistry > Freezing point equation. 10 points

Freezing point equation. 10 points

[From: ] [author: ] [Date: 11-09-15] [Hit: ]
......
How do you show that this equation:

Molar Mass = (Kf * mass of solute(g) ) / ( mass of solvent(kg) * delta T)

results from this equation:

delta T = Kf * m * i


I can't seem to put stuff together. Any help is greatly appreciated.

-
Definitions:
m = molality = mol solute / kg of solvent
mol solute = mass of solute / molar mass

dT = Kf x m x i

Substitute for m:
dT = Kf x (mol solute / kg of solvent) x i

Solve for mol solute:
mol solute = (dT x kg of solvent x i) / Kf

Substitute for mol solute:
mass of solute / molar mass = (dT x kg of solvent x i) / Kf

Solve for molar mass:
molar mass = (Kf x mass of solute) / (kg of solvent x i x dT)
1
keywords: Freezing,equation,points,10,point,Freezing point equation. 10 points
New
Hot
© 2008-2010 http://www.science-mathematics.com . Program by zplan cms. Theme by wukong .