drill: name & describe each of the 7 crystal structures
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Drill: Name & describe each of the 7 crystal structures. Drill: Draw LDDs for:. BF 3 NH 3 BeCl 3 C 3 H 6 H 3 PO 4 H 2 CO 3. Drill: Draw LDDs for:. C 6 H 8. Drill: Draw LDD for:. C 3 H 5 NO. CHM II. Test Friday. CHM II HW. Read: Chapter 14 Work Problems 25 & 29 on page 585. - PowerPoint PPT PresentationTRANSCRIPT
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Drill: Name & describe each of
the 7 crystal structures
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Drill: Draw LDDs for:
BF3 NH3
BeCl3 C3H6
H3PO4 H2CO3
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Drill: Draw LDDs for:
C6H8
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Drill: Draw LDD for:
C3H5NO
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CHM II
•Test Friday
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CHM II HW•Read: Chapter 14
•Work Problems 25 & 29 on page 585
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Solutions
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Solution•Homogeneous mixture made up of at least one solute dissolved in the solvent
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Solute •Substance being dissolved
•Portion in lesser molar amount
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Solvent•Substance doing the dissolving
•Portion in greatest molar amount
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Colloid•Slightly larger particles
•Light passes & particles stay suspended
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Suspension•Even larger particles
•Particles block or reflect light
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Tyndall Effect•Because light reflects off suspended particles, the light ray can be seen from the side
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Size Comparison•Solution < Colloid
•Colloid < Suspension
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Soluble•When one substance (solute) dissolves in another (solvent)
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Solubility•The amount of one substance (solute) dissolved in another (solvent)
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Concentration•The amount of solute dissolved into solution
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ConcentratedSolution
•A solution with a relatively large amount of solute dissolved
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Dilute Solution
•A solution with a relatively small amount of solute dissolved
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Saturated Solution•A solution with the maximum amount of solute dissolved in the solution
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Unsaturated Solution•A solution with less than the maximum amount of solute dissolved in solution
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Supersaturated Solution
•A solution with greater than the maximum amount of solute dissolved in solution
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Solution Measures•Concentration
–Molarity
–Molality
–Mole Fraction
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Percent Solution•Mass of one portion per the total mass, all times 100 %
•%soln = ma/mtotal x 100 %
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Drill:•Define & give units for:
–Molarity
–Molality
–Mole Fraction
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Molarity•Moles of solute per liter of solution
•M = molessolute/Lsoln
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Molality•Moles of solute per kilogram of solvent
•mo = molessolute/kgsolvent
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Mole Fraction•Moles of one portion per total number of moles in the solution
•X = molesa/molessoln
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Calculate the molarity of a 250 mL solution
containing 5.0 g NaOH dissolved in
water
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Calculate the molality of 69 g of C2H5OH dissolved
in 500.0 mL of water
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Calculate the mole fraction of each
portion when 92 g of C2H5OH dissolved in
144 mL of water
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Drill:•Calculate the mass of KI required to make 250 mL of 0.500 M KI.
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Review Drill
Review HW
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Calculate the molality & mole fraction of a
solution containing 46 g of C2H5OH
dissolved in 1782 mL of water
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Chm II HWProblems: 31 & 38
Page: 585 & 586
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AP Chm HWProblems: 31 & 35
Page: 298
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Colligative Properties•Properties dependent only on the concentration of particles in solution
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Examples•Vapor pressure
•Boiling & Freezing points
•Osmotic pressure
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Vapor Pressure•VPsolution = (VPsolvent)(Xsolvent)
•X = mole fraction•VP = vapor pressure
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Boiling & Freezing
T = imoKT = change in BP or FP
i = ionic activity
K = BP or FP constant
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Osmotic Pressure = iMRT
= osmotic pressure
i = ionic activity
M = Molarity
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Calculate the vapor pressure of a solution
containing 150 g C5H10O5 in 162 mL of
water at 30oC
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Drill:•Calculate the VP of a solution containing 36 % m/m glucose (C6H12O6) in water at 29oC:
•(VPwater = 30.0 mm Hg)
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Calculate BP & FP of 60.0 g of NaOH in
250 mL waterKBP = 0.512oC/moKFP = -1.86oC/mo
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Calculate the osmotic pressure of a solution
containing 12 g of NaOH dissolved in 250 mL solution at
27oC
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Chm II Homework:Problems: 47 & 87
Page: 585 - 587
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AP Chm HW:Problems: 31, 35, & 39
Page: 298
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Calculate the vapor pressure of a solution
containing 120 g C3H7OH in 144 mL of
water at its BP.
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Drill: Calculate the mass of lead(II)nitrate required to make 250
mL of 0.40 M Pb(NO3)2
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Test on Monday on Bonding, Lewis Dot
Diagrams, & Solution Chemistry
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Draw LDDs for:BH3 NCl3
CF4 C3H6
SO3 SO3-2
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Calculate the osmotic pressure of a solution
containing 12 g of C4H8O4 dissolved in 50.0 mL
solution at 27oC(VP = 26.7 mmHg)
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Clausius-Claperon Eq
Hv= R ln(T2)(T1) P2
(T2 – T1) P1
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VPbenzene Temp (oC) 24.5 2773.5 127
Calculate Hv for benzene:
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Calculate the osmotic pressure of a solution containing 29.9 g of CoBr3 dissolved in
7500 mL solution at 27oC
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Calculate the vapor pressure of a solution
containing 12.0 g C3H8O in 14.4 mL of
water at its BP.VPsolvent = 1.0 Atm
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Calculate the molality of a
solution that is 33.1 % by mass Pb(NO3)2
in water
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Drill: Calculate the osmotic
pressure of 0.88 g of CO2 in 750 mL
of soln at 27oC
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AP Test Tomorrow
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30.0 g C3H6NF was dissolved in 50.0 g
C6H12O (VP = 20.0 kPa) at 27oC making a 0.800
g/mL solution. Calculate: X, mo, M, , & VP.
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180 g C3H8O was dissolved in 180 mL
H2O at 27oC making a 1.5 g/mL solution.
Calculate X, mo, M, , VP, BP, & FP.
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A 1.2 g/cm3 aqueous solution is 20.0 % by mass NaOH at 27oC.Calculate: X, mo, M,
, & MP
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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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AP Homework:Read: Chapter 11Power Point: 19
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Chm II Homework:Read: Chapter 15Power Point: 16