CHEMISTRY 104  Rogue Community College
STUDY GUIDE FOR EXAM #2 (Wednesday, 11/6/13)
Chapter 3
Vocabulary: ionic compound; covalent compound; cation; anion; octet rule; polyatomic ion;
metal; non-metal; cation; anion; carbonate; cyanide; acetate; hydroxide; phosphate; sulfate; nitrate;
alkali metal; alkaline earth metal; silver; zinc; aluminum; “-ide” suffix
Equations/Rules:
name/write the cation first and the anion second
total charge of all ions in an ionic compound = 0
balance charges by adjusting subscripts
use the common ion charges for Groups 1A-8A on the periodic table
no Roman numerals for metals in groups 1A and 2A, Ag+, Zn2+ and Al3+
include Roman numerals on all other metals (in name, not formula)
parentheses are used when there is more than one of the same polyatomic ion
Skills: use and distinguish between vocabulary terms; give the correct name for the formula of an
ionic compound; write the correct formula for the name of an ionic compound; memorize the
names, atomic symbols and charges for Li+, Na+, K+, Mg2+, Ca2+, Sr2+, Ba2+, Ag+, Zn2+, Al3+;
memorize the names, formulas and charges for CO32-, CN-, C2H3O2-, OH-, PO43-, SO42-, NO3-;
recognize and describe several properties of ionic compounds
Chapter 4
Vocabulary: covalent compound; covalent bond; molecule; single bond; double bond; triple bond;
lone pair; diatomic molecule; molecular formula; Lewis structure; valence electrons; octet rule;
resonance; VSEPR; molecular geometry (or molecular shape); linear; trigonal planar; tetrahedral;
pyramidal; bent; electronegativity; dipole; polar bond; nonpolar bond; polar molecule; nonpolar
molecule; mono; di; tri; tetra; penta; hexa; hepta; octa; nona; deca
Equations/Rules:
use Greek prefixes to specify the number of each kind of atom
second element gets “ide” suffix
drop “mono” on the first element; keep “mono” on the second element
“a”/”o” prefixes drop last vowel for “oxide” (monoxide, tetroxide, etc …)
Skills: use and distinguish between vocabulary terms; determine whether a compound is ionic or
covalent based on its molecular formula; use Greek prefixes correctly to name a covalent
compound, given its formula; interpret Greek prefixes correctly to give the formula for a covalent
compound, given its name; memorize the Greek prefixes for 1-10 (mono through deca); memorize
the names and formulas for water (H2O), ammonia (NH3) and methane (CH4); give the correct
number of valence electrons in a given molecule or polyatomic ion; draw a correct Lewis structure
for a given molecule or polyatomic ion (valence electrons, HONC, octet rule); determine the shape
of a given molecule or polyatomic ion; determine whether a given bond is polar or nonpolar;
determine whether a given molecule is polar or nonpolar; recognize resonance structures; draw
resonance structures
Chapter 5
Vocabulary: chemical change; physical change; chemical reaction; reactant; product; Avogadro’s
number; mole; molar mass; atomic weight; molecular weight; formula weight; balanced equation;
coefficient; Law of Conservation of Mass; stoichiometry; theoretical yield; actual yield; percent
yield; limiting reactant; excess reactant; oxidation; reduction; redox reaction; half-reaction;
oxidizing agent; reducing agent
Equations:
n(FW) = m
m/(FW) = n
FW = m/n
where n = number of moles, m = mass and FW = formula weight (or molar mass)
n(NA) = N
N/(NA) = n
NA = N/n
where N = number of particles and NA = Avogadro’s number (6.022 x 1023)
FW = sum of AW’s from periodic table
GRAMS  MOLES  MOLES  GRAMS
Skills: use and distinguish between vocabulary terms; identify reactants and products in a chemical
reaction; write chemical equations based on word descriptions; memorize the seven diatomic
elements (H2, N2, O2, F2, Cl2, Br2, I2); balance chemical equations by adjusting coefficients;
calculate molar masses from atomic weights on the periodic table; convert grams to moles or
number of particles for a given substance; convert moles to grams or number of particles for a given
substance; perform stoichiometry calculations (grams A to grams B, moles A to moles B, grams A
to moles B and/or moles A to grams B); perform percent yield calculations; identify the limiting
reactant for a given reaction; identify redox reactions; identify half-reactions; identify oxidizing
agents and reducing agents
Lab
Vocabulary: metal, nonmetal, metalloid, proton, neutron, electron, atomic number, mass number,
isotope, flame test, electron configuration, periodic property, graph of atomic radius, ionic,
covalent, transition metal, polyatomic ion, linear, trigonal planar, tetrahedral, pyramidal, bent, polar,
nonpolar, reactant, product,
Skills: use and distinguish between vocabulary terms; recall colors from the following flame tests:
sodium (yellow-orange), potassium (violet), strontium (bright red), copper (blue-green); describe
observations and write balanced equations for the following reactions: magnesium and oxygen,
zinc and copper(II) sulfate, zinc and HCl, magnesium and HCl, sodium carbonate and HCl, calcium
chloride and sodium phosphate