Synthesis ReactionsSynthesis Reactions• Also known as direct combination

reactions.

• Two or more reactants form a single product.

• Generic Example:

• A + B AB

Synthesis ReactionsSynthesis Reactions

2Example: K + Cl2

K+1 and Cl-1

KCl

Remember to Balance!

2

Synthesis ReactionsSynthesis Reactions

2Example: Al + Br2

Al+3 and Br-1

AlBr3

Remember to Balance!

32

Decomposition ReactionsDecomposition Reactions

• A single reactant is broken down into two or more products.

• Generic Example:

• AB A + B

Decomposition ReactionsDecomposition Reactions

2Example: NaCl

Diatomic!!!

+ Cl2

Remember to Balance!

2 Na

+ O2Example: Al2O3

Decomposition ReactionsDecomposition Reactions

3

Diatomic!!!

Remember to Balance!

2 Al4

Single-Replacement RxnsSingle-Replacement Rxns

• A single element replaces an element in a compound to form a new compound and element.

• Generic Example:

• A + BX AX + B

Click here for a video that shows Ag replacing Cu

Single-Replacement RxnsSingle-Replacement Rxns

• You must use the Activity Series to determine if a reaction will work!

• Metals will replace other metals that appear below them

• (Pg. 295)

[http://cwx.prenhall.com/bookbind/pubbooks/hillchem3/medialib/media_portfolio/text_images/CH04/FG04_15.JPG]

Single-Replacement RxnsSingle-Replacement Rxns

[http://cwx.prenhall.com/bookbind/pubbooks/hillchem3/medialib/media_portfolio/text_images/

CH04/FG04_15.JPG]

Mg + AgNO3

Mg is above Ag, so the reaction will work!

Mg+2 and NO3-1

Mg(NO3)2+ Ag

Replaced Metal

2 2

Single-Replacement RxnsSingle-Replacement Rxns

[http://cwx.prenhall.com/bookbind/pubbooks/hillchem3/medialib/media_portfolio/text_images/

CH04/FG04_15.JPG]

Cu + FeSO4

Cu is below Fe, so the reaction will NOT work!

NR

“No Reaction”

Single-Replacement RxnsSingle-Replacement Rxns

• Non-metals will replace other non-metals that are below them on the periodic table.

[http://www.avon-chemistry.com/ch9_chart11.jpg]

Single-Replacement RxnsSingle-Replacement Rxns

Cl2 + KI

Cl is above I, so the reaction will work!

K+1 and Cl-1

KCl + I2

Diatomic!

2

[http://www.avon-chemistry.com/ch9_chart11.jpg]

2