Quiz 2/9/05
Cl1Fe?
Cl1-
Name all of the following
1. FeCl2
2. PbO
3. Cu2CrO4
O2Pb?
O2CrO42-
Co?
Co?
CrO42CrO42-
4.
5.
6.
7.
8.
9.
10.
CO2
P2O5
SiO2
FeO
NaCl
CCl4
NaOH
1.
2.
3.
4.
5.
ionic - iron (II) chloride
ionic -lead (II) oxide
ionic - copper (I) chromate
covalent- carbon dioxide
covalent- diphosphorous
pentoxide
6. covalent- silicon dioxide
7. ionic – iron (II) oxide
8. ionic – sodium chloride
9. covalent – carbon
tetrachloride
10. ionic – sodium hydroxide
CO2
covalent
carbon dioxide
FeCl2
ionic
iron (II) chloride
Electronegativity: the relative tendency of an
atom to attract electrons to itself when
participating in a chemical bond.
• Most bonds have some ionic character.
• If more than 50% of the time one ion has possession
of the electron, the compound is considered ionic.
• This means that if the difference in
electronegativity is greater than 1.67, the compound
is considered ionic.
• The more ionic a bond, the more easily a solution of
the compound will conduct electricity.
• Electricity is defined as the flow of electrons.
• Do pre-lab for lab 21 We will do the lab on
Thursday.
Naming Organic Compounds
meth = 1
eth = 2
prop = 3
but = 4
pent = 5
hex = 6
hept = 7
oct = 8
non = 9
…
• Organic compounds have one or
more carbons, surrounded with
hydrogens.
• They may have double or triple
bonds, and may include oxygen, or
other atoms.
• They are named by counting the
“carbon backbone” and applying a
prefix
• “Functional Groups” provide the
rest of the name.
Naming Organic Compounds
meth = 1
eth = 2
prop = 3
but = 4
pent = 5
hex = 6
hept = 7
oct = 8
non = 9
…
• Butane = 4 carbons
• CH3CH2CH2CH3
• Heptane = 7 carbons
• CH3CH2CH2CH2CH2CH2CH3
• Octane = 8 carbons
• CH3CH2CH2CH2CH2CH2CH2CH3
13 c page 178
6 hydrogen atoms
3 carbon atoms
13 f page 178
6 carbon atoms
12 hydrogen atoms
http://jchemed.chem.wisc.edu/JCESoft/CCA/CCA5/MAIN/1ORGANIC/ORG02/TRAM02/E/NOMOVIE/MISC.HTM
Molecular and Empirical Formulas.
• Molecular: adj. Pertaining to, consisting of,
caused by, or existing between molecules.
• Empirical: adj. 1. Relying upon or derived from
observation or experiment. 2. Guided by
practical experience and not theory, especially
in medicine.
• Formula: n 1. an established form of words for
use in a ceremony or procedure. 3. Chemistry:
a. a symbolic representation of the composition
or of the composition and structure of a
chemical compound. b. The chemical
compound so represented. c. A prescription in
exact proportion: recipe.
Molecular and Empirical
Formulas
•
•
•
•
C6H12O6
H2O2
Hg2I2
C6H14
CH2O
HO
HgI
C2H7
Coefficients: How many sets of a
particular compound/element
• 2 C6H12
Coefficients: How many sets of a
particular compound/element
• 5 C6H12