Review of Semester 1 content
1. How are the particle arrangements of solids,
liquids and gases different from each other?
2. How are the two types of mixtures different
from one another and how do we separate
them?
3. How is the periodic table arranged and
organized?
4. What information can we obtain from the
periodic table of elements?
5. How can we classify information on the
periodic table?
6. What trends occur (that we talked about)
when the periodic table is arranged by
increasing atomic number?
7. How is an ion different from an isotope?
8. Where are electrons located in an atom?
Valence electrons?
9. How is the formation of cations different
from the formation of anions?
10. How do we form the chemical formulas of
ionic compounds?
11. How do we name ionic compounds?
12. How are ionic compounds different from
covalent molecules?
13. What information can we obtain from the
VSEPR shape of a molecule?
14. How do we name covalent molecules?
15. How are acids different from bases?
16. What are the three types of representative
particles?
17.What are the three molar relationships and
how do we convert between the 3?
18. What is percent composition and what
information can percent composition help us
find?
19. What is the difference between a word
equation and a chemical equation?
20. Why do we balance chemical equations?
21. What are the 5 types of chemical reactions?
22. What are the steps in predicting products of
a chemical reaction?
23.Predict the products of the following
equations:
Al + Cl2 
Ag + HCl 
C2H2 + O2 
MgCl2 
Stoichiometry
Key Vocabulary
• Stoichiometry
Key Questions
• How do chemists use balanced chemical
equations?
• What process is used in finding the amount of
reactants needed or products produced in a
reaction?
Background
Top of left page: Write the recipe for making a
peanut butter and jelly sandwich.
Now, let’s say you want to make 100
sandwiches to satisfy a crowd. How much of
each ingredient will you need to start with?
Using Balanced Chemical Equations
• A balanced chemical equation provides the
same kind of quantitative information that a
recipe does.
• Chemists use these balanced equations to
calculate how much reactant is needed or how
much product is formed in a reaction.
Sample Problem
(On Left Page): in a five-day workweek, Tiny
Tyke is scheduled to make 640 tricycles. How
many wheels should be in the plant on
Monday morning to make these tricycles?
Interpreting Chemical Equations
• Balanced chemical equations can be
interpreted in terms of different quantities,
including numbers of atoms, molecules or
moles, mass and volume of reactants and
products.
N2(g) + H2(g)  NH3(g)
• Interpret the equation above in regards to
atoms, molecules, moles, mass and volume.
Left Page Handout
• Guided Practice: Put the handout on a left
page.
Using those interpretations….
• We can use the quantitative interpretations
we just learned to predict the relative
amounts of reactants needed or products
formed!
• In those equations…there are ratios.
– What is a ratio?
– What are some of the ratios that are present in
the following equation: N2(g) + H2(g)  NH3(g)
Stoichiometry
• The calculation of quantities in chemical
reactions!
• We can relate quantities of one chemical to
quantities of another through their mole
ratios!
Graphic Organizer
• On the left page…let’s complete the graphic
organizer on stoichiometric calculations!
Guided and Independent Practice