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