Chemical Reaction parts are mixed together to make something new.

Chemical Reaction

parts are mixed together to make something new

Types of Reactions1. Synthesis reactions

2. Decomposition reactions

3. Single displacement reactions

4. Double displacement reactions

You need to be able to identify each type.

1. Synthesis

Example C + O2

OO C + O O C

General: A + B AB

Ex. Synthesis Reaction

Synthesis

• Predict the products.

Na(s) + Cl2(g)

Mg(s) + F2(g)

Al(s) + F2(g)

NaCl(s)

MgF2(s)

AlF3(s)

22

2 3 2

Synthesis = join together

2. Decomposition

Example: NaCl

General: AB A + B

Cl Na Cl + Na

Ex. Decomposition Reaction

Decomposition

• Predict the products.

HgO

2KClO3

Hg2 + O2

2KCl + 3O2

2

Decomposition = split apart

3. Single DisplacementExample: Zn + CuCl2

ZnClCl Cu +

General: AB + C AC + B

ClCl Zn Cu+

Ex. Single Replacement Reaction

Single Replacement Reactions

• Predict the products.

Cl2 + 2NaBr 2NaCl + Br2

A A BBC C

2HgO + Cl2 2HgCl + O2

4. Double displacement

Example: MgO + CaS

General: AB + CD AD + CB

SOMg Ca

+O S

Mg Ca+

Single Replacement Reactions

• Predict the products.

CuCl2 + H2S CuS + 2HCl

BaCl2 + Na2SO4 2NaCl + BaSO4

join together

A + B AB

split apart

AB A + B

trade 1 placeAB + C AC + B

trade 2 placesAB + CD AC + BD

Which type of reaction?

4 P + 5 O2 P4O10

Which type of reaction?

Cl2 + 2NaBr 2NaCl + O2

Which type of reaction?

BaCl2 + Na2SO4 2NaCl + BaSO4

Which type of reaction?

2 HgO + Cl2 2HgCl + O2

Which type of reaction?

2 Al2O3 4 Al + 3 O2

Which type of reaction?

CuCl2 + H2S CuS + 2HCl

Which type of reaction?

3 H2 + N2 2 NH3

Which type of reaction?

2 HgO 2Hg + O2