5 January 2011
Grab your clicker! 
 Take Out: Week 17 Homework p. 1
 Objective: SWBAT classify reactions as
one of the five types of chemical reactions.
 Do now: Which types of reactions?
a) 2NaNO3  2NaNO2 + O2
b) AgNO3 + NaCl  AgCl + NaNO3

Agenda
Do now
II. Homework solutions
III. Model Types of Reactions
IV. Clicker Practice Problems
V. Stations Lab
VI. Demo: Combustion
VII. Hand back papers
Homework: Week 17 Homework p. 2-3
I.
Types of Chemical Reactions
Reaction Type
Composition
Decomposition
Single
Replacement
Double
Replacement
Combustion
General
Equation
Definition
Example
Composition Reaction
•
•
•
General Equation: A + X  AX
Definition: two or more substances
combine to form a new compound.
Example: 4Li(s) + O2(g)  2Li2O(s)
Composition

Li
+
Li
O2

O
O
Li2O
Decomposition Reaction
•
•
•
General Equation: AX  A + X
Definition: a single compound breaks
down into two or more simpler
substances.
Example: 2H2O(l)  2H2(g) + O2(g)
Decomposition
KClO3
K
K
O
Cl
O
KCl

Cl
O
+
O2
O
O
Single Replacement Reaction
General Equation: A + BX  AX + B
Definition: One element replaces a similar
element in a compound.
Example:Mg + 2HCl  H2 + MgCl2
2Al + Pb(NO3)2  3Pb + 2Al(NO3)3
Single Replacement

KI
+
K
Br2
Br
I
Br

KBr
+
I2
Double Replacement Reaction
General Equation: AX + BY  AY + BX
Definition: the ions of two compounds
exchange places in an aqueous solution to
form two new compounds.
Example:
2KI(aq) + Pb(NO3)2(aq)  PbI2(s) + 2KNO3(aq)
Double Replacement

CuCl2 + Na2S  2NaCl + CuS
Cl
Cl
Cu
Na
Na
S
Combustion Reaction
General Equation:
CxHy(g) + O2(g)  CO2(g) + H2O(g)
Definition: a substance combines with oxygen
and releases a large amount of heat
(exothermic) or light energy
Example: C2H6(g) +O2(g)  CO2(g) + H2O(g)
A + Y  AY
100%
1.
2.
3.
4.
5.
Composition Reaction
Decomposition Reaction
Single Replacement Reaction
Double Replacement Reaction
Combustion Reaction
1
0%
0%
2
3
0%
0%
4
5
A + BX  B + AX
100%
1.
2.
3.
4.
5.
Composition Reaction
Decomposition Reaction
Single Replacement Reaction
Double Replacement Reaction
Combustion Reaction
0%
1
0%
2
3
0%
0%
4
5
AB  A + B
100%
1.
2.
3.
4.
5.
Composition Reaction
Decomposition Reaction
Single Replacement Reaction
Double Replacement Reaction
Combustion Reaction
0%
1
0%
2
3
0%
0%
4
5
AB + XY  AY + XB
100%
1.
2.
3.
4.
5.
Composition Reaction
Decomposition Reaction
Single Replacement Reaction
Double Replacement Reaction
Combustion Reaction
0%
1
0%
0%
2
3
0%
4
5
A + O2  CO2 + H2O
83%
1.
2.
3.
4.
5.
Composition Reaction
Decomposition Reaction
Single Replacement Reaction
Double Replacement Reaction
Combustion Reaction
8%
8%
0%
1
2
0%
3
4
5
2H2O  2H2 + O2
1.
2.
3.
4.
5.
Composition Reaction
Decomposition Reaction
Single Replacement Reaction
Double Replacement Reaction
Combustion Reaction
0%
1
0%
0%
2
3
0%
0%
4
5
2C + O2  2CO
93%
1.
2.
3.
4.
5.
Composition Reaction
Decomposition Reaction
Single Replacement Reaction
Double Replacement Reaction
Combustion Reaction
7%
1
0%
0%
2
3
0%
4
5
Mg + CdCl2  Cd + MgCl2
80%
1.
2.
3.
4.
5.
Composition Reaction
Decomposition Reaction
Single Replacement Reaction
Double Replacement Reaction
Combustion Reaction
0%
1
20%
0%
2
0%
3
4
5
Al2(SO4)3 + 3Ca(OH)2  2Al(OH)2 + 3CaSO4
93%
1.
2.
3.
4.
5.
Composition Reaction
Decomposition Reaction
Single Replacement Reaction
Double Replacement Reaction
Combustion Reaction
7%
0%
1
0%
0%
2
3
4
5
2C6H14 + 19O2  12CO2 + 14H2O + heat
100%
1.
2.
3.
4.
5.
Composition Reaction
Decomposition Reaction
Single Replacement Reaction
Double Replacement Reaction
Combustion Reaction
0%
1
0%
0%
2
3
0%
4
5
BaO + H2O  Ba(OH)2
100%
1.
2.
3.
4.
5.
Composition Reaction
Decomposition Reaction
Single Replacement Reaction
Double Replacement Reaction
Combustion Reaction
1
0%
0%
2
3
0%
0%
4
5
2NaNO3  2NaNO2 + O2
100%
1.
2.
3.
4.
5.
Composition Reaction
Decomposition Reaction
Single Replacement Reaction
Double Replacement Reaction
Combustion Reaction
0%
1
0%
2
3
0%
0%
4
5
AgNO3 + NaCl  AgCl + NaNO3
67%
1.
2.
3.
4.
5.
Composition Reaction
Decomposition Reaction
Single Replacement Reaction
Double Replacement Reaction
Combustion Reaction
0%
1
33%
0%
2
0%
3
4
5
2Al + 3ZnCl3  3Zn + 2AlCl3
80%
1.
2.
3.
4.
5.
Composition Reaction
Decomposition Reaction
Single Replacement Reaction
Double Replacement Reaction
Combustion Reaction
13%
7%
0%
1
2
0%
3
4
5
What does a combustion reaction
require?
80%
1.
2.
3.
4.
5.
Heat
Oxygen
Carbon dioxide
Love
Gasoline
7%
7%
7%
0%
1
2
3
4
5
Which type of reaction?
1.
2.
3.
4.
5.
6.
7.
Al2(SO4)3 + 3Ca(OH)2  2Al(OH)2 + 3CaSO4
2C6H14 + 19O2  12CO2 + 14H2O + heat
BaO + H2O  Ba(OH)2
2NaNO3  2NaNO2 + O2
AgNO3 + NaCl  AgCl + NaNO3
2Al + 3ZnCl3  3Zn + 2AlCl3
What does a combustion reaction require?
5 January 2011
Take Out Homework: Writing/Balancing
Equations Worksheet AND Week 17
Homework p. 1
 Objective: SWBAT classify reactions as
one of the five types of chemical reactions.
 Do now: Which types of reactions?
a) 2NaNO3  2NaNO2 + O2
b) AgNO3 + NaCl  AgCl + NaNO3

Agenda
Do now
II. Homework solutions
III. Finish lab stations
IV. Demo: Combustion
V. Pass back papers/New Seat Requests
Homework: Week 17 Homework p. 3
I.
Reactions Stations Lab
6 stations – 10 minutes each
 4 stations are chemical reactions
 SAFETY needs to be a priority
 GOGGLES are at the stations where they
are required – wear them!
 2 stations are practicing moles-moles and
mass-mass stoichiometry
 Do station 2 and then station 5, even if you
come to station 5 first.

Reactions Stations lab
Will collect packet at end of class for a lab
grade
 Take your notebook, the lab packet, a
pencil, a calculator, and a periodic table
with you

Demo: Combustion
2HCl(aq) + 2Mg(s)  H2(g) + 2MgCl(aq)
 2H2(g) + O2(g)  2H2O(g) + heat
 There’s no carbon dioxide because our fuel
(H2) contains no carbon. This is a very
simple combustion.

Seat Requests
Flip the page so that “front” is in front.
 Write 1, 2 and 3 for your top three choices
of places to sit.
 Write the names of TWO people you work
well with.
 Write your name on the paper.

Progress Reports
Do NOT include a lab report grade for the
hydrate lab.
 Not turning this in WILL lower your
grade!
 After I grade it, that grade WILL affect
your grade!

Homework

Week 17 Homework Page 3