1. 23.3 – Classifying Chemical Reactions

2. Objectives Identify the general types of chemical reactions.
Predict which metals will replace other metals in a compound.

3. Synthesis Reaction Two or more substances form a new substance
A + B  C

4. Decomposition reaction
One substance breaks down into two or more substances
AB  A + B

5. Single-Displacement Reaction
One element replaces another one in a compound
A + BC  AC + B
D + BC  BD + C

6. Double-Displacement Reaction
Results if a precipitate, water, or a gas forms when two ionic compounds in solution are combined
AB + CD  AD + CB

7. Activity Series
In single displacement reactions, more reactive metals can replace less reactive metals
Most reactive – lithium, potassium, sodium
Least reactive – gold, silver, copper

8. A + BX  AX + B AX + BY  AY + BX Synthesis A + B  AB Na + Cl2  NaCl
Decomposition AB A + B
2NaCl  2Na + Cl2
Single-Displacement
A + BX  AX + B
Mg + CuSO4  Cu + MgSO4
Double-displacement
AX + BY  AY + BX
CaCO3 + HCl  CaCl2 + H2CO3

9. Combustion Reaction
Type of synthesis reaction that produces heat and light
Involves a carbon compound plus oxygen gas to produce carbon dioxide and water
2 C2H6 + 7 O2  4 CO2 + 6 H2O

10. Video

11. In-Class Assignment/Homework
23.3 WKT

12. Synthesis A + B  AB
Na + Cl2  NaCl
Decomposition AB A + B
2NaCl  2Na + Cl2
Single-Displacement A + BX  AX + B
Mg + CuSO4  Cu + MgSO4
Double-displacement AX + BY  AY + BX
CaCO3 + HCl  CaCl2 + H2CO3
Combustion CxHY + O2  CO2 + H2O
2 C2H6 + 7 O2  4 CO2 + 6 H2O