1. The 5 Types of Chemical Reactions

2. The 4 Types of Chemical Reactions
There are 5 types of chemical reactions that you must be able to identify.
They are:
The 4 Types of Chemical Reactions
Synthesis Reactions
(a.k.a. Addition Reaction)
2) Decomposition Reaction
3) Single Displacement Reactions
4) Double Displacement Reactions
5) Combustion Reactions

3. The 4 Types of Chemical Reactions
Synthesis Reaction
a.k.a. Addition/Composition Reaction
The 4 Types of Chemical Reactions
When two or more reactants (elements or compounds) combine to produce one new product. - A + B  A B
A + BC  ABC
AB + CD  ABCD

4. The 4 Types of Chemical Reactions
Synthesis Reaction
The 4 Types of Chemical Reactions + 
A B  AB

5. Synthesis Reactions H2 + Cl2  2 HCl H2O + SO2  H2SO3
Examples:
H Cl  2 HCl
H2O + SO  H2SO3
Zn Cl2  ZnCl2

6.  - + A B A B ABC  A + BC ABC  A + B + C ABCD  AB + CD
2) Decomposition Reaction
When one compound is broken down into two or more products, which can be elements or compounds. Exact opposite of synthesis reactions.  - + A B A B
ABC  A + BC
ABC  A + B + C
ABCD  AB + CD

7. 2) Decomposition Reaction
AB  A B

8. Decomposition Reactions
Examples:
2 H2O  2 H O2
CaCO3  CaO CO2

9. Combustion Reactions
When a compound or element is reacted with O2 (g) to form the most common oxides that make up that compound.
-These reactions usually accompany heat and light.
Complete combustion – products H2O and CO2
Incomplete Combustion - products H2O and CO

10. Combustion Reactions
Combustion reactions occur when a hydrocarbon reacts with oxygen gas.
This is also called burning!!! In order to burn something you need the 3 things in the “fire triangle”: 1) A Fuel (hydrocarbon) 2) Oxygen to burn it with 3) Something to ignite the reaction (spark)

11. Combustion Reactions In general: CxHy + O2  CO2 + H2O
Products in combustion are ALWAYS carbon dioxide and water. (although incomplete burning does cause some by-products like carbon monoxide)
Combustion is used to heat homes and run automobiles (octane, as in gasoline, is C8H18)

12. Combustion Reactions
Edgar Allen Poe’s drooping eyes and mouth are potential signs of CO poisoning.

13. Relationships and Chemistry 
YOUTUBE
Relationships and Chemistry 

14. 4.2: Synthesis and Decomposition Reactions
Synthesis reaction
A + B  AB
Ex. metal + oxygen  metal oxide
2 Mg (s) + O2 (g)  2 MgO (s)
Ex. metal + nonmetal  salt
2 Na (s) + Cl2 (g)  2 NaCl (s)
Decomposition Reaction
AB  A + B
Ex. 2 HgO (s)  2 Hg (l) + O2 (g)

15. The 4 Types of Chemical Reactions
3) Single Displacement
Reaction
The 4 Types of Chemical Reactions
When an element and a compound react to form a new element and a new compound. + A + BC  AC B
A + BC  B + AC
AB + C  AC B

16. The 4 Types of Chemical Reactions
3) Single Displacement
Reaction
The 4 Types of Chemical Reactions +  +
A + BC  B + AC

17. Activity Series Foiled again – Copper loses to Aluminum F2 Cl2 Br2 I2Li Rb K Ba Ca Na Mg Al Mn Zn Cr Fe Ni Sn Pb H2 Cu Hg Ag Pt Au
Element Reactivity
Foiled again –
Copper loses to Aluminum F2
Cl2
Br2 I2

18. Single Displacement Reactions:
A variety of predictions can be made based on the activity series of metals:
potassium (K) most reactive never found form stable
sodium (Na)
calcium (Ca) “free” in nature compounds
magnesium (Mg)
aluminum (Al)
zinc (Zn)
iron (Fe)
nickel (Ni)
tin (Sn)
lead (Pb)
hydrogen (H)
copper (Cu)
mercury (Hg)
silver (Ag)
platinum (Pt) found “free” form unstable
gold (Au) least reactive in nature compounds

19. The activity series ranks the relative reactivity of metals.
It allows us to predict if certain chemicals will undergo single displacement reactions when mixed: metals near the top are most reactive and will displacing metals near the bottom.
Q: Which of these will react?
Fe + CuSO4 
Ni + NaCl 
Li + ZnCO3 
Al + CuCl2  K Na Li Ca Mg Al Zn Fe Ni Sn Pb H Cu Hg Ag Au
No, Ni is below Na
Yes, Li is above Zn
Yes, Al is above Cu
Yes, Fe is above Cu
Cu + Fe2(SO4)3
NR (no reaction)
Zn + Li2CO3
Cu + AlCl3

20. A variety of predictions can also be made based on the activity series of nonmetals:
fluorine (F) most reactive never found form stable
Chlorine (Cl) “free” in nature compounds
bromine (Br)
oxygen (O)
iodine (I) found “free” form unstable
sulphur (S) least reactive in nature compounds
A nonmetallic element will displace from a compound (in solution) any nonmetal that is located below it in the activity series of nonmetals.
Examples:
1. F2(g) + 2NaBr(aq)  2NaF(aq) + Br2(aq)
2. I2(s) + NaBr(aq)  no reaction

21. Mg + 2 HCl  MgCl2 + H2 Cl2 + 2 NaI  I2 + 2NaCl Single Displacement
Reactions
Examples:
Mg HCl  MgCl H2
Cl NaI  I NaCl

22. The 4 Types of Chemical Reactions
4) Double Displacement
Reaction
The 4 Types of Chemical Reactions
When two compounds react to form two new compounds. + AB + CD  AD CB
AB + CD  AD + CB

23. 4) Double Displacement Reaction
DANCING +  +

24. Double Displacement Reactions Example:
Ca(OH)2 + MgSO4  Mg(OH)2 +CaSO4

25. Double Replacement Reactions
Think about it like “foil”ing in algebra, first and last ions go together + inside ions go together
Example:
AgNO3(aq) + NaCl(s)  AgCl(s) + NaNO3(aq)
Another example:
K2SO4(aq) + Ba(NO3)2(aq)  KNO3(aq) + BaSO4(s) 2

26. Neutralization Reactions
neutralization reactions are when an acid and a base are combined with each other, forming two neutral products
ACID + BASE  WATER + a SALT
this is a special type of double displacement reaction.

27. You might be too young for this…but who doesn’t love
Fight Club –Lye Scene
You might be too young for this…but who doesn’t love
BRAD PITT!
48 s –stop
1min 45s –Start up again

28. Practice some DOUBLE DISPLACEMENT! 
Predict the products. Balance the equation
HCl(aq) + AgNO3(aq) 
CaCl2(aq) + Na3PO4(aq) 
Pb(NO3)2(aq) + BaCl2(aq) 
FeCl3(aq) + NaOH(aq) 
H2SO4(aq) + NaOH(aq) 
KOH(aq) + CuSO4(aq) 

29. Single and Double Replacement Reactions
Single-replacement reaction
Mg CuSO4  MgSO Cu
General form:
A BC  AC B
Double-replacement reaction
CaCO HCl  CaCl H2CO3
General form:
AB CD  AD CB

30. Mixed Practice
State the type, predict the products, and balance the following reactions:
BaCl2 + H2SO4 
C6H12 + O2 
Zn + CuSO4 
Cs + Br2 
FeCO3 