Types of ReactionsSynthesis, Decomposition &

Combustion

Types: Synthesis

Example C + O2

OO C + O O C

General: A + B AB

Synthesis Reactions 1. element + element binary compound Example: 2K(s) + Cl2(g) 2KCl(s) 2. nonmetallic oxide + water acid Example: SO3(g) + H2O(l) H2SO4(aq)3. metallic oxide + water base Example: CaO(s) + H2O(l) Ca(OH)2(aq) 4. metal/non metal + oxygen metal/nonmetal oxide Example: Fe(s) + O2 (g) Fe2 O3(aq)

Predict the Products

• Na (s) + Cl2 (g)

• MgO (s) + H2O (l)

• CO2 (s) + H2O (l)

2NaCl(s)

Mg(OH)2(aq)

H2CO3(aq)

Types: Decomposition

Example: NaCl

General: AB A + B

Cl Na Cl + Na

Cl

Types: Decomposition

Example 2HgO

O Hg

O Hg

Hg

O O Hg

+

General: AB A + B

Decomposition Reactions

1. binary compound element + element

Example: 2H2O(l) 2H2(g) + O2(g) 2. carbonate carbon dioxide +

oxide Example: CaCO3(s) CO2(g) +

CaO(s)

Predict the Products

K (s) + Cl2 (g)

H2 (g) + O2 (g)

CO2 (g) + CaO (s)

N2(g) + I2 (g)

KCl(s)

H2O(aq)

CaCO3(aq)

NI3

Types: CombustionExample CH4 + O2 CO2 +H2O

OO C + O O C

General: Hydrocarbon + O2 CO2 +H2O

H

H

H

H O HH+

Combustion Reactions 1. element + oxygen oxide Example: 2Mg(s) + O2(g) 2MgO(s)2. hydrocarbon + oxygen carbon dioxide gas

+ water vapour Examples:

CH4(g) + 2O2(g) CO2(g) + H2O(g)3. hydrocarbon + (limited)oxygen carbon dioxide +

water vapour+carbon monoxide +carbon

Example:2C3H8 + 5O2 2CO + 4C + 8H2O