Download Chapter 1: Chemistry and You

2015-2016 Chemistry Midterm Review
This review sheet is a list of topics and sample practice problems only. The practice problems
are good representation of what to expect on the midterm, but it is not enough to just study from
the review. You need to look over your notes, old review sheets, tests and quizzes, homework,
etc. Ask questions!!!! You may check your answers online and I am available Tuesday,
Wednesday, and Thursdays for extra help.
Chapter 1 & 2: Intro to Chemistry
Key Topics:
 What is chemistry
 Uncertainty in Measurement –sig figs
 Physical and chemical properties
 Physical and chemical changes
1. Determine the number of significant figures in the following values:
a. 6.70
_______
c. 15,300
_______
b. 0.03260
_______
d. 4.68
_______
2. Perform the following calculations and express your answer with the correct number
of significant figures:
a. 34.0 x 45.62 = _______
b. 45 – 95.24 = _______
Chapter 3: Atomic Structure
Key Topics:
 Models of the atom (modern atomic theory)
 Isotopic Notation, Subatomic particles
 Valence Electrons and Ions
3. Describe the basic structure of the atom in the modern atomic theory
(be able to label protons, neutrons, electrons, and the nucleus) (Ch. 3):
4.
14
6
C
protons = _______
neutrons = _______
5. Distinguish between atoms, isotopes, and ions.
electrons = _______
Chapter 4: The Periodic Table
Key Topics:
 Organization of the Periodic Table (Periodic Law)
 Periodic Trends: Electronegativity
 Recognize properties of main groups
6. How are elements organized on the periodic table? Describe common trends
across the periods and down the groups. (Ch 4):
7. Arrange the following elements in order of increasing electronegativity and
decreasing ionization energy: Ca, Ge, As, K, Br, Ga
8. Recognize the following areas on your periodic table (some may overlap) and
describe properties of the special families (Ch 4):
o Metals
o Nonmetals
o Metalloids
o Transition metals
o Alkali family
o Alkaline earth family
o Halogen family
o Noble gases
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Chapter 5 & 6: Chemical Bonding
Key Topics:






Octet Rule
Naming and writing formulas
Properties of ionic versus covalent compounds
Lewis Dot structures
Polar vs. Non-polar
VSEPR
9. Compare and contrast ionic and covalent bonds (Ch 5 and 6, essay):
Ionic
Both
Covalent
10. Name the following ionic compounds or covalent molecules (Ch 5, 6):
a.
NH4Cl
__________________ __________________
b.
CO2
__________________ __________________
c.
SiF4
__________________ __________________
d.
CuO
__________________ __________________
e.
NaF
__________________ __________________
f.
CCl4
__________________ __________________
g.
Mg(NO3)2
__________________ __________________
h.
SnO4
__________________ __________________
11. Write formulas for the following ionic compounds of covalent molecules (Ch 5, 6):
a.
magnesium hydroxide
_____________
b.
carbon monoxide
_____________
c.
copper(II) chloride
_____________
d.
selenium hexachloride
_____________
e.
calcium hydroxide
_____________
f.
sodium phosphate
_____________
g.
dinitrogen pentoxide
_____________
h.
phosphorus trichloride
_____________
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11. Draw Lewis Structures (Ch 6):
CH3Cl
12.
OF2
SO3
Identify the shape and bond angle of molecular compounds (Ch 6):
VSEPR Chart Reference
Bonded
Lone
Atoms
Pairs
Linear
2
0
Bent
2
2
Tetrahedral
4
0
Trigonal Pyramidal
3
1
Shape
Lewis Structure
Shape
Bond
Angle
180
< 109.5
109.5
< 109.5
Bond angles
NH3
SO2
CCl4
4
Chapter 8: The Mole
Topics:
 Mole
 Avogadro’s number
 Percent composition
 Empirical formulas
 Molecular formulas
Be able to…
 Calculate molar mass
 Convert between grams and moles
 Convert between number of particles and moles
 Perform multi-step conversions
 Calculate percent composition
 Determine empirical formula
 Determine molecular formula
13. Determine the molar mass of the following compounds (Ch 8):
Al2(SO4)3
KBr
Li2O
14. Find the percent composition of each element (Ch 8):
%Mg in MgSO4?
%H in C2H5O?
5
15. Mole conversions (Ch 8):
# of moles in 2.5g of Aluminum Oxide?
# of moles in 15g of Neon?
# of atoms in 0.5mol of Gold?
# of atoms in 1.5 grams of Zinc (II) Chloride?
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