Colligative Properties PowerPoint

More documents

Recommendations

Info

Freezing Point Depression• Solution freezing points are always lowerthan that of the solvent liquid.• A similar formula is used to calculate thechange in the freezing point.ΔT f = k f m• ΔT f is the change in the freezing temp.,subtracted from the liquid’s original FP.• k f is the ‘molal freezing point constant’ whichdepends on the solvent. For water, k f is1.86°C/molal• m is the molality of the solution.
Freezing Solutions• Solutions typically do not freeze solidly.• Pure solvent crystals freeze from themixture, turning it slushy.• The solution that remains is moreconcentrated, dropping the freezingpoint even further.• Finally a matrix of solid solvent withpockets of highly concentrated solutionresult.
Page 1 and 2: Colligative PropertiesThe Physical
Page 3 and 4: Molality• Molality measures the m
Page 5 and 6: Molality• Example:What is the mol
Page 7 and 8: Molality• Determine the molality
Page 9 and 10: Molality• Convert grams of solven
Page 11 and 12: Changes in Vapor Pressure• Animat
Page 13 and 14: Solution Vapor Pressure• But what
Page 15: Boiling Point Elevation• There is
Page 19 and 20: Practical Applications• Antifreez
Page 21 and 22: The van’t Hoff Factor• We have
Page 23 and 24: The van’t Hoff Factor• ΔT b =
Page 25 and 26: Heat of Solution• Most materials
Page 27 and 28: Endothermic Heat of SolutionNH 4 Cl
Page 29 and 30: Exothermic Heat of SolutionCaCl 2 (
Page 31 and 32: Calculating Heat Exchange• A simp
Page 33 and 34: Calculating Heat Exchange• The sp

Colligative Properties PowerPoint

Create successful ePaper yourself

Delete template?

Save as template?