Synthesis Reactions

1
Synthesis Reactions

• Also known as direct combination reactions.
• Two or more reactants form a single product.
• Generic Example
• A B ? AB

2
Synthesis Reactions
K1 and Cl-1
Example K Cl2 ?
KCl
2
2
Remember to Balance!
3
Synthesis Reactions
Al3 and Br-1
Example Al Br2 ?
AlBr3
3
2
2
Remember to Balance!
4
Decomposition Reactions

• A single reactant is broken down into two or more
  products.
• Generic Example
• AB ? A B

5
Decomposition Reactions
Diatomic!!!
2
Example NaCl ?
Cl2
2
Na
Remember to Balance!
6
Decomposition Reactions
Diatomic!!!
O2
Example Al2O3 ?
3
2
Al
4
Remember to Balance!
7
Single-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
8
Single-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/hillche
m3/medialib/media_portfolio/text_images/CH04/FG04_
15.JPG
9
Single-Replacement Rxns
Mg2 and NO3-1
Mg(NO3)2
Ag
2
Mg AgNO3?
2
Replaced Metal
Mg is above Ag, so the reaction will work!
http//cwx.prenhall.com/bookbind/pubbooks/hillche
m3/medialib/media_portfolio/text_images/CH04/FG04_
15.JPG
10
Single-Replacement Rxns
No Reaction
NR
Cu FeSO4?
Cu is below Fe, so the reaction will NOT work!
http//cwx.prenhall.com/bookbind/pubbooks/hillche
m3/medialib/media_portfolio/text_images/CH04/FG04_
15.JPG
11
Single-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
12
Single-Replacement Rxns
K1 and Cl-1
KCl
I2
2
Cl2 KI?
2
Diatomic!
Cl is above I, so the reaction will work!
http//www.avon-chemistry.com/ch9_chart11.jpg