1. Ch. 7 Notes Day 3
4/20/16

2. Objectives
SWBAT explain the difference between different reaction types
SWBAT identify the differences and relationships between synthesis and decomposition

3. Types of Chemical Reactions
You can predict the outcome of a reaction if you know what type it is.
We will be covering 5 types in physical science.
The type of reaction can also be used to determine whether it will “suck in energy” (ENDOthermic) or release energy (EXOthermic).
PS. I hope you folks are up on your celebrity couples.

4. Reaction Types Kanye Kim Kimye Ben
Synthesis- two or more substances combine to form a new SINGLE substance
A + B  AB
Examples
2Na + Cl2  2NaCl
2H2 + O2  2H2O
Kim Kardashian + Kanye West  Kimye
Decomposition- a single substance decomposes (breaks down) into two or more simpler substances.
AB  A + B
CaCO3  CaO + CO2
2H2O  2H2 + O2
Bennifer  Ben Affleck + Jennifer Lopez
Kanye
Kimye
Kim
Bennifer
Ben
Jennifer

5. Reaction Types
Single Displacement- when a more reactive single element takes the place of another in a compound
A + BC  AC + B
Examples
Cu + 2Ag(NO3)  2Ag + Cu(NO3)2
2K + 2H2O  H2 + 2KOH

6. Reaction Types
Double Displacement- when two compounds exchange positive ions to make two new compounds
AD + BC  AC + BD
Examples
Pb(NO3)2 + 2KI  PbI2 + 2K(NO3)
Ca(CO3) + 2HCl  CaCl2 + H2(CO3)

7. Reaction Types
Combustion- when a carbon compound reacts with oxygen to produce carbon dioxide and water.
Carbon Compound + O2  CO2 + H2O
Examples
CH4 + 2O2  CO2 + 2H2O
2C8H O2  16CO2 + 18H2O

8. QUIZ
Write down each equation, and identify what type of reaction it is:
MgO  Mg + O2
FeCl3 + NH4OH  Fe(OH)3 + NH4Cl
C2H3 + O2  H2O + CO2
Al + O2  Al2O3
Donald + Bill(Melinda)  Bill + Donald(Melinda)