1. Types of Chemical Reactions

2. How would YOU describe what is happening in the following generic reactions?
If you were to name these types of reactions based on what is happening, how would YOU name them?

3. 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

4. Synthesis Reaction (Combination)
Two or more substances combine to form a new, more complex substance
General Form: A + B  AB
Example: 2Na + Cl2  2NaCl

5. Decomposition Reaction
A complex substance breaks down into two or more simpler substances
General Form: AB  A + B
Example: 2H2O  2H2 + O2

6. 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

7. 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

8. Practice
Balance the chemical equation if necessary. (What law is this?)
List the type of reaction that is occurring.
Li2O H2O  LiOH
Pb(NO3) KI  PbI KNO3
Fe3O H2  Fe + H2O
NH3  N H2
CaCO3  CaO + CO2
SrBr2 + (NH4)2CO3  SrCO3 + NH4Br
C + O2  CO2
Cu AgNO3  Cu(NO3) Ag 2
synthesis 2 2
double-displacement 4 3 4
single-displacement
decomposition 2 3
decomposition 2
double-displacement
synthesis 2
single-displacement