Reaction Predictions ! !

Reaction Predictions ! !

Types of Chemical Reactions • Single Displacement • Double Displacement • Decomposition • Synthesis • Combustion

Single Displacement • A +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 is • How 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 Displacement • AB + CD  AC + BD • Elements switch partners !

Example 1: • Na3PO4+BaCl2Ba3(PO4)2 +NaCl

Example 2: K3PO4+ MgSO4

Decomposition • AB  A + B • Breaking chemical compound up, going from BIG to SMALL !

Example 1: • Au2O3Au + O2

Example 2: • H2O

Synthesis • A + B  AB • Joining! Making new chemical compound !

Example 1: • Mg + N2 Mg3N2

Example 2: • Be + Cl2

You Pick Two

Combustion • HYDROCARBON (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 • Zinc metal combines with hydrochloric acid (HCl). • Sodium sulfide combines with magnesium oxide. • Calcium oxide breaks down. • C4H8 burns

Reaction Predictions ! !