Chpt%2013-2

# Chpt%2013-2 - Colligative Properties End of 13 Not in spell...

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Colligative Properties End of 13 Not in spell check

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( 29 solvent mol solute mol solute mol ) ( fraction Mole (kg) solvent mass solute mol ) ( Molality (L) solution volume solute mol (M) Molarity + = = = X m Note the denominator here is solvent!
13.6 Colligative Properties Colligative properties: Do not depend on the identity of the solute Vapor pressure lowering Boiling point elevation Freezing point depression Osmotic pressure

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13.6 Colligative Need to understand disassociation reaction first: 0.2 mol NaCl makes 0.4 mol ions because: NaCl Na + + Cl - How many species are in solution when the following are dissolved in water? 0.14 moles of Ca(OH) 2 0.35 moles of K 3 PO 4 0.08 moles of C 2 H 5 OH
Raoult’s Law P solvent = X solvent * P 0 solvent Vapor pressure of solution Mole fraction of solvent Vapor pressure of solvent After dissolving something Before dissolving something Note: of solvent The vapor pressure of water is 55.3 torr at 40 degrees Celsius, what is the vapor pressure when 4.12 g of CH 2 O is added to 1.3 kg of water?

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## This note was uploaded on 11/29/2011 for the course CHEM 1212 taught by Professor Dockery during the Fall '08 term at Kennesaw.

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Chpt%2013-2 - Colligative Properties End of 13 Not in spell...

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