CHEMISTRY 182
Experiment #2
BEER-LAMBERT LAW
INTRODUCTION:
In this experiment you will be introduced to the Beer-Lambert Law (often referred to as Beers
Law), the fundamental law upon which spectrophotometric methods of analysis are based.
Spectrophotomet
Helpful Equations and Constants
Plancks Constant:
h = 6.626 x 10-34 Js
Avogadros number:
6.022 x 1023 units/mol
Speed of light:
c = 2.9979 x 108 m/s
Conversions: 1 m = 109 nm = 1012 pm = 1010
1 Joule =
1
kg m2
s2
= 10-3 kJ
Equations:
= c
E
hc
h
1
1
1
Chem 172
Winter 2010
EXAM II
Name
Seminar Hour
_
50 pts
This exam is worth a total of 50 points. Be sure to answer questions completely. Partial credit can be
given only if all work is shown! If I cant read it, I cant grade it!
1.
Rank the following in th
Review Topics For Third Exam
Chapter 10.8:
Molecular orbital theory
Simple diatomic species
Bond order (stability)
Prediction of magnetic properties
Draw molecular orbital diagrams for simple species (s orbitals only) and predict relative stability
bas
Chemistry 172
Exam III
Winter 2010
Seminar Hour: _
Name_
This exam is worth a total of 50 points. Make sure numerical work is shown in an orderly manner, with the correct
number of significant digits. Clearly indicate your answers by underlining or circli
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Chemistry 172
Winter 20 1a
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Exam III
Seminar Hour:
This exam is worth a total of 50 points. Make sure numerical work is sh~wnin an orderly manner, with the con
number of significant digits. Clearly indicate your answers by under
Review Topics For Second Exam
Chapter 8: (8.7 and 8.8)
Ionic radius
Ionization energy
Electron affinity
Know trends in ionic radius (isoelectronic series), ionization energy, electron affinity.
Explain exceptions to ionization energy trends. Know definiti
Chemistry 172
Winter 2010
Exam I
Name:_
Seminar Hour: _
This exam is worth a total of 50 points. Make sure numerical work is shown in an orderly manner, with
the correct number of significant digits. Clearly indicate your answer by underlining or circling
Fall 2016
EE 102
Christina Fragouli
Signals and Systems
Exercise 1: Solutions
1
Exercises
Problem 1 Sinusoid Signals with Different Frequencies, Phases and Amplitudes
In this problem, we use MATLAB to plot basic sinusoid signals with different frequencies
Review for Exam I
Chapter 7:
Electromagnetic spectrum
Wave nature of light
Particle nature of light
Bohr model of atom
Hydrogen spectrum
Rydberg equation
Energy states of hydrogen atom
Wave properties of matter (wave-particle duality)
Quantum mechanical m
Chemistry 172
Winter 2010
Group Exercise 4
Name:
KEY
Seminar Hour_
1.
Rank the following in order of increasing stability.
MgS
NaCl
2 pts
CaSe
NaCl< CaSe<MgS
The size of ions in CaSe is greater than the size of ions in MgS. Since the charges are both +2
a
Model Limitations
Interested in molecular shape means use VSEPR
and hybridization, but there are limitations
Valence Bond Theory understates electron
delocalization
Valence Bond Theory predicts that oxygen
is diamagnetic because all electrons are
paired,
Practice #9
The vapor pressure of ethanol is 115 torr at 34.9oC. If
Hvap of ethanol is 40.5 kJ/mol, calculate the temperature
(in oC) when the vapor pressure is 760 torr.
1
Uniqueness of Water
Geometry: bent, very polar, small molecule
Solvent properties:
Hybridization - Valence Bond Theory
Covalent bond forms when atomic orbitals
overlap and are occupied by an electron pair
located between the nuclei ( in phase)
Maximum orbital overlap (more overlap is more
stable, end-to-end not side-to-side)
Atomic orbi
CHEMISTRY 182
Models
PRE-LAB EXERCISE:
1.
Determine the total number of valence electrons in the following species:
C2HF3
2.
SO42
Draw a Lewis Dot structure for each of the following species:
N2H4
3.
C2H4O H3O+
CO32
NH4+
SO2
Draw a three dimensional sketc
Name: ~ it?
Seminar Hour: ' '
Chemistry 172 A f,_
Winter 2010 "f “ [/2 a:
\
<1
This exam is worth a total of 50 points. Make sure numerical work is shown in an orderly manner, with
the correct number of signiﬁcant digits. Clearly indicate your answer b
Chem 172 EXAM 11 Name ~3
Winter 201 0
Seminar Hour
50 pts
This exam is worth a total of 50 points. Be sure to answer questions completely. Partial credit can be
given only if all work is shown! If I can’t read it, I can’t grade it!
1. Rank the following i
Fall 2016
EE 102
Christina Fragouli
Signals and Systems
Exercise 1
In this exercise, we mainly practice the basic skills of MATLAB, including how to represent signals,
how to plot the waveforms of different signals, and how to perform simple operations of