Transcript Types-of-Reactions-and-Predicting

Types of Reactions
and Predicting
Products
SNC2D
Types of Reactions
Reactions can be divided into 4 main types:
 Synthesis
 Decomposition
 Single Displacement/Replacement
 Double Displacement/Replacement
Synthesis
Synthesis: 2 or more reactants combine to form
1 product
Synthesis
Synthesis: 2 or more reactants combine to form
1 product
Synthesis
Synthesis: 2 or more reactants combine to form
1 product
e.g.
Mg + O2 -> MgO
Synthesis
Synthesis: 2 or more reactants combine to form
1 product
e.g. 2 Mg + O2 -> 2 MgO
Synthesis
Synthesis: 2 or more reactants combine to form
1 product
e.g. 2 Mg + O2  2 MgO
S
+ Zn  ZnS
Decomposition
Decomposition: 1 reactant breaks down into 2 or
more products
Decomposition
Decomposition: 1 reactant breaks down into 2 or
more products
e.g.
H2O  H2 + O2
Decomposition
Decomposition: 1 reactant breaks down into 2 or
more products
e.g. 2 H2O  2 H2 + O2
Decomposition
Decomposition: 1 reactant breaks down into 2 or
more products
e.g. 2 H2O  2 H2 + O2
KClO3  KCl + O2
Decomposition
Decomposition: 1 reactant breaks down into 2 or
more products
e.g. 2 H2O  2 H2 + O2
2 KClO3  2 KCl + 3 O2
Single Displacement
Single Displacement: a single element replaces
another in a compound
Single Displacement
Single Displacement: a single element replaces
another in a compound
e.g. MgBr2 + Cl2  MgCl2 + Br2
Negative ions replace negative ions!
Single Displacement
Single Displacement: a single element replaces
another in a compound
e.g. Fe + CuSO4 
Single Displacement
Single Displacement: a single element replaces
another in a compound
e.g. Fe + CuSO4  Cu + FeSO4
And positive ions replace positive ions!
Double Displacement
Double Displacement: parts of two compounds
switch places
Double Displacement
Double Displacement: parts of two compounds
switch places
e.g. NaOH + FeCl3 
Double Displacement
Double Displacement: parts of two compounds
switch places
e.g. NaOH + FeCl3  Fe(OH)3 +
NaCl
Double Displacement
Double Displacement: parts of two compounds
switch places
e.g. 3 NaOH + FeCl3  Fe(OH)3 + 3 NaCl
Double Displacement
Double Displacement: parts of two compounds
switch places
e.g. 3 NaOH + FeCl3  Fe(OH)3 + 3 NaCl
Remember that positive ions pair with negative
ions.
Combustion
And remember that there also exist combustion
reactions:
e.g. the combustion of hydrocarbons like methane
CH4 + O2  CO2 + H2O