Transcript Types of Chemical Reactions - Chippewa Falls High School

Types of Chemical
Reactions
1. How would YOU describe what is happening in the
following generic reactions?
2. If you were to name these types of reactions based
on what is happening, how would YOU name them?
Types of Chemical Reactions
• Most chemical reactions that we will experience follow the
general formats that you just described
• These 4 main types are known as:
•
•
•
•
Decomposition
Double-Displacement
Single-Displacement
Synthesis
• Based on your descriptions, match up the type of reaction with
what you think is the actual name
synthesis
______________________
decomposition
______________________
single-displacement
______________________
double-displacement
______________________
Synthesis Reaction (Combination)
• Two or more substances combine to
form a new, more complex substance
• General Form: A + B  AB
• Example: 2Na + Cl2  2NaCl
Decomposition Reaction
• A complex substance breaks down
into two or more simpler substances
• General Form: AB  A + B
• Example: 2H2O  2H2 + O2
Single-Displacement Reaction
(Single-Replacement)
An uncombined element replaces an
element that is part of a compound
General Form: A + BX  AX + B
Example: 2Na + 2HOH  2NaOH + H2
Double-Displacement Reaction
(Double-Replacement)
The positive ion of one compound
replaces the positive ion of the other
compound to form 2 new compounds
General Form: AX + BY  AY + BX
Example: MgCO3 + 2HCl  MgCl2 + H2CO3
Practice
•Balance the chemical equation if necessary. (What law is this?)
•List the type of reaction that is occurring.
H2O  2 LiOH
synthesis
1.
Li2O +
2.
Pb(NO3)2 + 2 KI  PbI2 + 2 KNO3
double-displacement
3.
Fe3O4 + 4 H2  3 Fe + 4 H2O
single-displacement
4. 2 NH3 
decomposition
N2 + 3 H2
5.
CaCO3  CaO + CO2
6.
SrBr2 + (NH4)2CO3  SrCO3 + 2 NH4Br double-displacement
7.
C + O2 
8.
Cu + 2 AgNO3 
decomposition
CO2
synthesis
Cu(NO3)2 +
Ag
single-displacement