X-Ray Diffraction: Determining the distance between planes of atoms X-rays and atoms Orders of diffraction Bragg

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X-Ray Diffraction Determining the distance
between planes of atomsX-rays and atomsOrders
of diffractionBraggs Law
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Using X-Ray Diffraction Braggs Law
Platinum metal crystallizes in a face-centered
cubic lattice with one atom per lattice point.
Monochromatic X-radiation from a Mo target has a
wavelength of 71.07 pm. If this radiation is
used in a diffraction experiment with a platinum
crystal, a second order diffracted beam is
observed at a theta value of 10.43. If the
spacing between these planes corresponds to the
unit cell length (d a), what is the d-spacing
between the planes that gave rise to this
reflection?
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Chapter 13 Mixtures solutions, complex
mixtures, colligative properties
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Chapter 13 Colligative Properties Properties
of the solvent that change upon dissolution
Vapor pressure Boiling point Freezing
point Osmotic pressure Key 1 This all
involves solute particles blocking molecules
from leaving the liquid state Key
2 It does not matter what the solute is, just
how many particles (molecules or ions are
present)
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Concentration Units
Molarity Molality Mole Fraction Weight
Percent ppm ppb
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Colligative Propreties Properties of the solvent
that change upon dissolution
Vapor Pressure of water at 20 oC is 20.1 mm Hg.
What is the pressure of 100 g water mixed with
100 g ethylene glycol, C2H4(OH)2?
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Distillation Changing the composition of a
mixture of volatile liquids
Vapor Pressures at 50 oC Water 99 mm
Hg Ethanol 232 mmHg Distill a 10 alcohol
solution.
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Freezing and Boiling Point Changes Phase
Diagrams
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Boiling Point Elevation An extension of Vapor
Pressure Lowering
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Boiling Point Elevation
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Freezing Point Depression
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Effect of Ions ?Tfp Kfpmi i vant Hoff
factor Vant Hoff factors NH3 KCl CaCl2 FeBr
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Which is better at melting ice, per gram, NaCl or
CaCl2?
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