Reaction Predictions ! !

Types of Chemical Reactions

1) Single Displacement

2) Double Displacement

3) Decomposition

4) Synthesis

5) Combustion

Single DisplacementA +BC AC + B

One element shoves the other element out!

Example 1: Ca + AlCl3 CaCl2 + Al

Example 2: AlCl3 + K

Example 3: Zn + FeCl2

What do metals have to do with reaction predictions?

Metals vary in reactivity Lose electrons in a reaction AND give the electrons to someone else

Metal’s ability to give electrons depends on how reactive the metal isHow easily/quickly the metal wants to give up its

electrons

Activity Series of Metals

Metals listed and arranged according to reactivity.

Metals will displace other metal ions in a solution from any metal BELOW it

Generally, Metals > H2 on activity series will produce

hydrogen gas (H2) when combined with an acid

Metals < H2 cannot produce hydrogen gas (H2) from an acid

Example 1: Predict the products

Mg(s) + Cu+2(aq)

Example 2: Predict the products.

Ag(s) + Cu+2(aq)

Example 3: Predict the products.

Al(s) + H+(aq)

Example 4: Predict the products.

Ag(s) + H+(aq)

Double DisplacementAB + CD AC + BD

Elements switch partners !

Example 1: Na3PO4 + BaCl2 Ba3(PO4)2 +

NaCl

Example 2: K3PO4 + MgSO4

DecompositionAB A + B

Breaking chemical compound up, going from BIG to SMALL !

Example 1: Au2O3 Au + O2

Example 2: H2O

SynthesisA + B AB

Joining! Making new chemical compound !

Example 1: Mg + N2 Mg3N2

Example 2: Be + Cl2

You Pick Two

CombustionHYDROCARBON (compound made up of just

Cs and Hs) + O2 CO2 + H2O

Chemical reactions involve a compound burning.

Example 1: C2H6 + O2 CO2 + H2O

Example 2: Propane (C3H8) burns

Gandalf combines aluminum metal with sodium hydroxide in solution. What does he produce?]======

Practice 1) Zinc metal combines with hydrochloric acid

(HCl).

2) Sodium sulfide combines with magnesium oxide.

3) Calcium oxide breaks down.

4) C4H8 burns