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Title: Solutions Author: Ken Borah Last modified by: Physics4 Created Date: 10/3/2003 12:07:14 PM Document presentation format: On-screen Show Other titles – PowerPoint PPT presentation

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Title: Name


1
Name describe each of the 7 crystal structures
2
Solutions
3
Solution
  • Homogeneous mixture made up of at least one
    solute dissolved in the solvent

4
Solute
  • Substance being dissolved
  • Portion in lesser molar amount

5
Solvent
  • Substance doing the dissolving
  • Portion in greatest molar amount

6
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8
Colloid
  • Slightly larger particles
  • Light passes particles stay suspended

9
Suspension
  • Even larger particles
  • Particles block or reflect light

10
Tyndall Effect
  • Because light reflects off suspended particles,
    the light ray can be seen from the side

11
Size Comparison
  • Solution lt Colloid
  • Colloid lt Suspension

12
Soluble
  • When one substance (solute) dissolves in another
    (solvent)

13
Solubility
  • The amount of one substance (solute) dissolved in
    another (solvent)

14
ConcentratedSolution
  • A solution with a relatively large amount of
    solute dissolved

15
Concentration
  • The amount of solute dissolved into solution

16
Dilute Solution
  • A solution with a relatively small amount of
    solute dissolved

17
Saturated Solution
  • A solution with the maximum amount of solute
    dissolved in the solution

18
Unsaturated Solution
  • A solution with less than the maximum amount of
    solute dissolved in solution

19
Supersaturated Solution
  • A solution with greater than the maximum amount
    of solute dissolved in solution

20
Solution Measures
  • Concentration
  • Molarity
  • Molality
  • Mole Fraction

21
Percent Solution
  • Mass of one portion per the total mass, all times
    100
  • soln ma/mtotal x 100

22
Molarity
  • Moles of solute per liter of solution
  • M molessolute/Lsoln

23
Molality
  • Moles of solute per kilogram of solvent
  • mo molessolute/kgsolvent

24
Mole Fraction
  • Moles of one portion per total number of moles in
    the solution
  • X molesa/molessoln

25
Calculate the molarity of a 250 mL solution
containing 5.0 g NaOH dissolved in water
26
Drill Calculate
  • mass of NaCl required to make 1.5 L of 2.0 M NaCl

27
Calculate the molality of 69 g of C2H5OH
dissolved in 500.0 mL of water
28
Calculate the mole fraction of each portion when
92 g of C2H5OH dissolved in 144 mL of water
29
Calculate the molality mole fraction of a
solution containing 46 g of C2H5OH dissolved in
1782 mL of water
30
Colligative Properties
  • Properties dependent only on the concentration of
    particles in solution

31
Examples
  • Vapor pressure
  • Boiling Freezing points
  • Osmotic pressure

32
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33
Drill
  • Calculate the VP of a solution containing 36
    glucose (C6H12O6) in water at 29oC
  • (VPwater 30.0 mm Hg)

34
Vapor Pressure
  • VPsolution (VPsolvent)(Xsolvent)
  • X mole fraction
  • VP vapor pressure

35
Boiling Freezing
DT imoK DT change in BP or FP i ionic
activity K BP or FP constant
36
Osmotic Pressure
p iMRT p osmotic pressure i ionic
activity M Molarity
37
Calculate the vapor pressure of a solution
containing 150 g C5H10O5 in 162 mL of water at
30oC
38
Calculate BP FP of 60.0 g of NaOH in 250 mL
waterKBP 0.512oC/moKFP -1.86oC/mo
39
Calculate the osmotic pressure of a solution
containing 12 g of NaOH dissolved in 250 mL
solution at 27oC
40
Calculate the vapor pressure of a solution
containing 120 g C3H7OH in 144 mL of water at its
BP.
41
Calculate the osmotic pressure of a solution
containing 12 g of C4H8O4 dissolved in 750 mL
solution at 27oC
42
Clausius-Claperon Eq
(T2)(T1) P2 (T2 T1) P1
Hv R ln
43
VPbenzene Temp (oC) 24.5 27 73.5
127Calculate Hv for benzene
44
Drill Calculate BP FP of 88 g of CO2 in 750 mL
waterKBP 0.512oC/moKFP -1.86oC/mo
45
Calculate the osmotic pressure of a solution
containing 29.9 g of CoBr3 dissolved in 7500 mL
solution at 27oC
46
Calculate the vapor pressure of a solution
containing 12.0 g C3H8O in 14.4 mL of water at
its BP.
47
180 g C3H8O was dissolved in 180 mL H2O at 27oC
making a 1.5 g/mL solution. Calculate X, mo, M,
p, VP, BP, FP.
48
Drill Calculate the mass of lead(II)nitrate
required to make 250 mL of 0.40 M Pb(NO3)2
49
300 g C3H6NF was dissolved in 500 g C6H12O at
27oC making a 0.800 g/mL solution. Calculate X,
mo, M, p, VP, BP, FP.
50
Calculate the molality of a solution that is 33.1
by mass Pb(NO3)2
51
A 1.2 g/cm3 aqueous solution is 20.0 by mass
NaOH at 27oC. Calculate X, mo, M, p, MP
52
Calculate the molecular mass of a covalent
compound dissolved in an aqueous solution to make
it 25 by mass when it boils at 102.048oC
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