[PDF] 12.6 Colligative Properties Colligative properties are properties of





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Colligative properties of solutions

Colligative properties depend only on number of particles of the solute and do not depend on its identity. Page 3. Classification. Colligative properties are:.



Read Online Colligative Properties Of Ionic Solutions

il y a 2 jours Introduction: Colligative properties are properties of solutions that depend on the concentration of the dissolved particles (molecules or ...



File Type PDF Colligative Properties Of Ionic Solutions

Colligative properties of solutions are properties that depend on the concentration of solute molecules or ions in solution but not on the chemical identity of 



Experiment on Colligative properties Colligative properties are the

solutions that depend on the TOTAL concentration of solute particles in solution. The list of colligative properties includes: a) lowering vapor pressure 



Solutions and Colligative Properties

Solutions and Colligative Properties. There are several solution properties that depend on the relative numbers of solute and solvent particles.



I. Multiple Choice Questions (Type-I) 1. Which of the following units

8. Colligative properties depend on ______. (i) the nature of the solute particles dissolved in solution. (ii) the number of solute 



Read Free Colligative Properties Of Ionic Solutions

Colligative properties of solutions are properties that depend up- on the concentration of solute molecules or ions but not upon.



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8. Colligative properties depend on ______. (i) the nature of the solute particles dissolved in solution. (ii) the number of solute 



Question 8. Colligative properties depend on (a) the nature of the

(c) the physical properties of the solute particles dissolved in solution. (d) the nature of solvent particles. Solution: (b) Colligative properties depend 



12.6 Colligative Properties

Colligative properties are properties of a liquid that change when a solute is dissolved. • Colligative properties depend only on the number of solute particles 

12.6 Colligative Properties!

Colligative properties are properties of a liquid that change when a solute is dissolved.! • Colligative properties depend only on the number of solute particles, not on the identity of the solute.!

Four colligative properties:

!1. Vapor pressure lowering"2. Freezing point depression"3. Boiling point elevation"4. Osmotic pressure"!!!

Colligative Properties!

• A solution will have a higher boiling point and a lower freezing point than the pure liquid:! (p. 574)

Freezing Point Depression"

• A solute lowers the freezing point of the solvent. The amount that the freezing temperature is reduced (∆T

f ) depends on the molality of the solute:! !∆T f = K f m"""• K f is the Freezing Point Depression constant, and depends on the solvent (1.86

°C/m for water).!

• ∆T f is always a decrease in temperature, so an aqueous solution will freeze at 0.0 °C - ∆T f

Boiling Point Elevation"

• Since a non-volatile solute lowers the V.P. of a solvent, it also raises the boiling point:! !∆T b = K b m""• K b = 0.512 °C/m for water.!• The b.p. of a solution is the b.p. of the pure liquid + ∆T b

Osmotic Pressure"

If aqueous solutions are separated by a 䇾semipermeable membrane䇿 which allows water but not solute to pass across it, osmosis will cause a net flow of water across the membrane into the more concentrated solution. !

• This flow of water produces a pressure called the osmotic pressure, Π:! Π = MRT (M = molarity, R = 0.08206 L•atm/mol•K)!

Figure 12.16

Reverse Osmosis"

• If a pressure greater than Π is applied to the more concentrated side, pure water will flow across the membrane. This is known as reverse osmosis, a method for purifying water.!

12.7 Colligative Properties of Electrolytes"

NaCl lowers the freezing point of water by almost twice the expected amount. Why? Because NaCl dissociates to Na

and Cl in solution: !NaCl (s) è Na (aq) + Cl

(aq) !!• So for electrolytes: ∆T = i K m!!• i is called the van't Hoff factor, the number of particles

per formula unit that the compound dissociates into in solution.!

Colligative Properties of Electrolytes (contd.)!

Many solutions are non-ideal due to association of ions, and have i less than the expected value, due to ion pairing.!

Figure 12.17

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