Transcript Slide 1

By Mr Michael
Reaction Types and
Balancing Review
How to read chemical equations


A + BC  AC + B
Reactants  Products
What 5 types of reaction do
you know?
 Synthesis
 Decomposition
 Single Replacement
 Double Replacement
 Combustion
A+B  AB
AB  A + B
A + BC  AC + B
AB + CD  AD + CB
Reactant  CO2 + H2O
Synthesis
 What are some examples of synthetic items?
 Synthetic Material
 Synthetic Oil
 A+BAB
 Fe + S  FeS
 Video
Fe + S  FeS
Iron + SulfurIron(II) Sulfide
Decomposition
 What happens when food
goes bad?
 Does it smell?
 Does it brake up into smaller
pieces?
 This means that it
decomposes
More Decomposition
 2 H2O  2 H2 + O2
 Water  Hydrogen + Oxygen
 H2O2  H2O + O2
 Hydrogen Peroxide  Water + Oxygen
 Do you notice anything wrong with this equation?
 Is the equation balanced?
 2H2O2

2H2O + O2
video
2H2O2

2H2O + O2
How could you prank someone?
Single Replacement
 A + BC  AC + B
 AlBr3 + Cl2 
AlCl3 + Br2
 Na + H2O  NaOH + H2
Double Replacement
 AB + CD  AD + CB
Double Replacement
 FeS
+
 Balanced?
HCl
 FeCl2
+
H2S
Combustion Reaction
 Oxygen (o2)
combines with
another element to
produce CO2 + H2O
 C10H8 + 12 O2 
 10 CO2 + 4 H2O
Gummy Bear Escape
Justin Beaver Says…
 Step 1
 Check if it is a
combustion reaction
 Step 2
 Check if compounds
are being formed or
separated
 Step 3
 Are things getting
replaced? How
many?