Predicting Hybridization and
1. Start by drawing the Lewis structure.
2. Use VSEPR Theory to predict the electron group
geometry around each central atom.
3. Use Table 7.3 to select the hybridization scheme
that matches the electron group g
Demo: Paramagnetic or Diamagnetic
According to Lewis Bonding Theory,
which of the following element is
diamagnetic and which one is
Nitrogen (N2) and Oxygen (O2)
Lewis Structures for N2 and O2:
Paramagnetism of Oxygen
Practice What is the H for decomposing 10.0 g of
limestone, CaCO3, under standard conditions?
CaCO3(s) CaO(s) + CO2(g)
Practice What is the H for decomposing 10.0 g of limestone?
Silver Tree Redox Reaction
A copper wire is placed in a 0.100 M silver nitrate (AgNO3) solution.
A spontaneous Redox reaction occurs where the silver metal
precipitates as the copper ions go into solution.
Cu(s) + 2Ag+(aq) Cu2+(aq) + 2Ag(s)
The reaction c
Example: Using Lewis theory to predict chemical
formulas of ionic compounds
Transfer all the valence electrons
from the metal to the nonmetal,
adding more of each atom as you
go, until all electrons are lost from
the metal atoms and all
nonmetal atoms h
Nylon 6,10 Synthesis
Nylon is a synthetic polymer made from the reactions
between a di-acid and and a di-amine.
Nylon 6,6 was discovered by Wallace Carothers of DuPont in
It is an interfacial condensation reaction between sebacoyl
chloride and hexam
Dry Ice in a Basic Solution
Basic (NaOH) solution with a universal indicator.
A universal indicator is typically composed of a blend of indicators such as
methyl red (4.4 red & 6.2 yellow), bromothymol blue (6.0 yellow &7.6
blue), and thymol blue (redyell
Demo - Chemical Sunset
Formation of colloidal sulfur (-sulfur) as precipitates
Two step process
2 H+ (aq) + S2O32- (aq)
H2SO3 (aq) + colloidal sulfur
Light passes through the solution is scattered to produce col
Exam One is scheduled on Wednesday (9/28) from 8:00am 8:50am. Students are
encouraged to show up between 7:30am -7:45am. Make sure you have a buddy
to wake you up!
Exam Review and Studying Resources:
Exam Review Session is scheduled
Dry Ice Bubble
Add some Dry Ice in a pan of soapy water.
Dry Ice is solid Carbon Dioxide (CO 2).
Dry Ice goes from a solid directly to a gas.
The sublimation process occurs at 78.5C.
What are being formed?
The Fog is made of Water!
Polycyclic Aromatic Hydrocarbons
Contain multiple benzene rings fused together.
fusing = sharing a common bond
Exam 2 Information
Exam Two is scheduled for Wednesday (10/26) from 8:00am - 8:50am.
Please double-check the location of the exam rooms on
Linear Electron Geometry
When there are two electron groups around the
central atom, they will occupy positions on opposite
sides of the central atom.
This results in the electron groups taking a linear
The bond angle is 180.
Combustion of Alcohol
Alcohols are organic compound with a OH functional group.
Alcohols will combust in the presence of oxygen to produce
carbon dioxide and water.
It is highly EXOTHERMIC!
CO2(g) + 2 H2O(l) Hc = 736 kJ/mol
= 0.792 g/cm3
Molecular Motion in Liquid Nitrogen
What is temperature?
Temperature is an indication of the amount of energy and
the amount of molecular motion a substance has.
Energy always travel from higher to lower temperatures.
As temperature goes down, the amo
Two-Body Heat Transfer Problems,
PV Work, and Bomb Calorimetry
Heat Transfer & Final Temperature
When two objects at different temperatures are
placed in contact, heat flows from the material at the
higher temperature to the material at the lower
Dr. Alex Ma
Department of Chemistry and
What is Chemistry?
. and why the hell do I have to take it?
What is Chemistry?
The study of matter?
The study of the INTERACTIONS of
The study of the
Quiz Question #1
When was the Constitution of the United States ratified?
December 16, 1773
July 4, 1776
May 25, 1787
September 17, 1787
June 21, 1788
Answer to Quiz Question #1
Crime scene investigators sprays a suspicious area with Luminol and turn
out all the lights. Traces of blood will cause the area to glow in the dark.
Luminol oxidizes in the presence of a catalyst such as Fe in
When atoms or molecules absorb energy, that energy is
often released as light energy.
fireworks, neon lights, etc.
When that emitted light is passed through a prism, a
pattern of particular wavelengths of light is seen that is
unique to that type
Topics to be Covered
The Nature of Light
Wave-Particle Duality and the Uncertainty Principle
Quantum Mechanics of the Atom
Quantum Numbers and Atomic Orbitals
The Beginnings of Quantum Mechanics
Until the beginning of the
Measurements, Precision, and the Treatment of Data
The general procedure in experimental chemistry includes the following basic steps:
1. Measurements are made with certain instruments.
2. The data from these measurements may be substituted i
CHEM-1110: Chemistry I with Advanced Laboratory
A Redox Titration: The Stoichiometry of the Permanganate-Oxalic Acid Reaction
Suggested Reading: Read chapter 9 in your text book concerning oxidation-reduction reactions.
To use volume
a. 5:333. 522?. 3. @
an? 3&1 m. .l I. + Em. .gmuua
233% El .2. .I In 2.62. in.
2.? E. .l .2 N + 3.22.
umwl Emu .I 2. a + .32.
.n.m.l WW2 .I la +.m.+.z
.2: E. T. I. n 1.53%
. gal . .I I. .m. J. .i.
2.- 2. .I .2
Chemistry I Lab Policies
The prelab must be completed and submitted at the beginning of the
discussion session in order to enter the laboratory.
No prelab will result in a ZERO for the entire experiment.
No make up labs permitted without an acce
No lab on 9-7-2016
Pre-lab report due beginning of day 9-14-2016
5 min iclicker quiz
30 min discussion problem sets
10 min comments from TA on lab prep
Pre-lab report (5 points)
Laboratory notebook (duplicates)
Wave Behavior of Electrons
Louis de Broglie (18921987)
de Broglie proposed that particles could have wave-like
de Broglie predicted that the wavelength of a particle
was inversely proportional to its momentum.
Because it is so small, the wave c