VCL 13-3: Converting Concentrations to Different Units
Occasionally, when making solutions in the laboratory, it is convenient to make a solution with a certain
concentration unit, such as molaiity, and then conveit the concentration to a different unit.
VCL 3-5: Counting Molecules
Start Virtual ChemLab and select Counting Atoms and Molecules from the list of assignments. The
lab will open in the Calciimetiy laboratory.
Enter the stockrooni by clicking inside the Stockroom window. Once inside the stock
VCL 13-1: Creating a Solution of Known Molality
In this assignment, you will weigh out a sample of solid mm and create a solution of known molality.
Start Virtual Chen/[Lab and select Creating a Solution ofKnown Molality from the list of assignm
Names of Ionic Compounds
VCL 2-5: Names and Formulas of Ionic Compounds
In this problem, you will go into the virtual laboratory and make a series of ionic compounds containing
the cations Ag+, Pb+, Ca2+, Fe, and Cult observe the reactions and identify th
Laboratory 5 Spectrophotometry Pre-Lab Questions
You are expected to print and read the laboratory exercises.
The questions below will help you prepare for the laboratory exercise.
Make sure you can answer these questions before the lab session as
CHEM 1411, GENERAL CHEMISTRY-I
(CH. 4-5-6; Masterton, Hurley, and Neth, 7th Ed.)
1. If aqueous solutions of nickel(II) chloride and potassium phosphate are mixed, which insoluble
compound will form?
DETERMINING OXIDATION STATES OF ATOMS OF COMPOUNDS AND POLYATOMIC IONS
(Much of this material comes courtesy of Chemistry: Principles and Reactions, 7th edition by
Masterton, Hurley, and Neth.)
To determine the oxidation state of an atom of a compou
Development of the Atomic Theory
400 BC Leucippus and Democritus:
matter composed of small,
Plato and Aristotle:
matter had no smallest parts; made
of fire, air, earth, and water
(1800s) John Dalton
Electronic Structure and Periodic
Properties of Elements
Composed of perpendicular oscillating waves, one for
the electric field and one for the magnetic field
All electromagnetic waves move through space at the same
Chapter 1and part of Chapter 2
Properties of Matter,
Measurements, Problem Solving,
Chemistry studies MATTER .
and how matter changes
Matter is composed of particles.
-atoms, molecules, and subatomic particles such as
neutrons, protons, and elec
Properties of Gases
(from Chapter 1)
The most important gas laws involve the
Chemical Reactions and Chemical Quantities
In a physical change,
The identity and composition
of the substance does not
The state can change, or the
material can be torn into
When water boils, it changes
Chemical Bonding and Compounds
When two or more elements combine, a compound
with entirely different properties is formed.
Na: explosive metal
Cl2: poisonous gas
NaCl: essential to life!
Energy: capacity to Do Work
Due to Motion
Due to Position or Composition
Energy of electrons in chem. bonds
Energy is a property of
Composition of Compounds
Formula Weight/Molar Mass of a Compound
Formula Weight = Sum of the masses of the atoms in a
The formula weight of water is
2(1.008 amu H) + 16.00 amu O = 18.02 amu
Molar Mass = Formula weight expressed in grams
The unit of length the furlong is used in horse racing. The chain
and the link are units of length used in surveying. There are 8
furlongs in a mile, 10 chains in a furlong, and 100 links in a chain.
To three significant figures, what is the length of 1 l
Valence Bond and
Molecular Orbital Theory
Valence bond theory describes a covalent bond as the overlap of half-filled
atomic orbitals (each containing a single electron) that yield a pair of electrons
shared between the two bonded atoms.
orbitals on two d
X. Betamethasone is a potent glucocorticoid steroid with antiinflammatory and
immunosuppressive properties. Circle each stereocenter in Betamethasone .(10 pts)
XI. (5 ptseach) Indicate "R" or "S"for these Carbons;
Xm.(15 pts) Writechiral or achiralon the following molecules.
c\ tt,it I
XIV. BONUS (20points) A Studentsynthesized asample oflcarvone andmeasured anobserved
rotationof +45". Thespecific rotation for lcarvone is 62.5". Dividing and multipl
Read Carefully! Readthe entire testbefore Starting.
Place all ofyour answers onthe printed pages'
if more room isneeded use the BACK ofthe preceding page. Good Luck !
( 20 poi
Continued: Give an acceptable IUPAC name to each ofthe following compounds.
H3C CH CHz CHCH2CH2 CH CH:
C' ):.i, cfw_ .ll,i ii il .;
lr'.', 't 'i,
J l:,I flrt'
VIII. (10 pts)
Considerthe following equation which represents a protontransfer.
Usingthe abbreviated pKa TableonPage #6
Calculate theapproximate pKeq and Keq for this protontransfer reaction.
Circle the conect
( 10 points/ particle) (20 pts total)
For the following particles:
COH2 ; Czclz
A. Identify the particle asa moleculp, cation, anion, orradical.
B. Draw LcwisDot Structures
C. Give the approximate shape
D, Give the Hybridi
Dr. Fabio Moretzsohn
Department of Life Sciences
T 9-11 am
R 10-11 am
F 3-5 pm
Other times by appointment
More about me
TAMUCC as a postdoc in 20
Youth Employment Summit 2002
Launching a Global Campaign of Action in Alexandria in 2002, so that an additional 500 million young
adults, especially youth facing poverty, will have productive and sustainable livelihoods by the year 2012
Five Pathways to A
Pearson Education Publications
General Chemistry: Atoms First by J.E. McMurray & R. C. Fay
Notes - Alan D. Earhart, Southeastern Community College, Lincoln, NE
Chemistry: A Molecular Approach by N.J. Tro
Notes - Roy Ken
Thoroughly conscious ignorance is the prelude to every real advance in science.
The ignorance here is not the stupidity like many people might think. This ignorance is
the communal knowledge that we have not figured out yet and we are aware of its importa