1. 5 Types of Reactions 1. Synthesis 2. Decomposition
3. Single Replacement
4. Double Replacement
5. Combustion

2. A + B  AB “The Marriage” 2 H2 + O2  2 H2O 1. Synthesis
only 1 product
A + B  AB
2 H2 + O2 
2 H2O

3. AB  A + B “The Break-Up” 2H2O2  2H2O + O2 2. Decomposition
only 1 reactant
2H2O2 
2H2O + O2

4. 1 element replaces another element
3. Single Replacement
1 element replaces another element
“The Kickout”
A + BX  AX + B
Demo
Demo – Mg + HCl in test tube
Mg + 2 HCl 
MgCl2 + H2

5. _____ > _____ > _____
3. Single Replacement
Activity Series of Metals
more active metals will replace less active metals
Demo
Cu(s) + 2 Ag+(aq)  Cu2+(aq) + 2 Ag(s)
K + CuCl  KCl + Cu
Demo – AgNO3 and Cu wire in test tube
Li + KCl  LiCl + K
Cu + LiCl  no rxn Li K Cu
_____ > _____ > _____

6. two compounds “switch ions”
NOT REDOX
4. Double Replacement
“Switchin’ Partners”
two compounds “switch ions”
AX + BY  AY + BX
Demo
Demo – Pb(NO3)2 + KI  PbI2 in test tube
2 KI + Pb(NO3)2 
2 KNO3 + PbI2

7. CxHy+O2  CO2+H2O “Burnin” C3H8 + 5 O2  3 CO2 + 4 H2O 5. Combustion
burning a hydrocarbon (CxHy) in O2
always forms CO2 and H2O
CxHy+O2  CO2+H2O
C3H8 + 5 O2 
3 CO2 + 4 H2O

8. 1–4 Redox Synthesis A0 + B0 → A+B– Single Replacement
A0 + B+X– → A+X – + B0
2H2 + O2  2H2O
Zn + 2HCl  ZnCl2 + H2
Decomposition
A+B – → A0 + B0
Combustion
CxHy + O2 → CO2 + H2O – + +4 –2 + –2
H2O2  H2 + O2
CH4 + 2O2  CO2 + 2H2O

9. Quick Quiz!
1. Which type of reaction is described by the following equation?
6 Li + N2  2 Li3N
A. synthesis
B. decomposition
C. single-replacement
D. combustion
REDOX?

10. Quick Quiz. Mg + 2 HNO3  Mg(NO3)2 + H2
2. Which type of reaction is described by the following equation?
Mg + 2 HNO3  Mg(NO3)2 + H2
A. synthesis
B. decomposition
C. single-replacement
D. double-replacement
REDOX?

11. Quick Quiz. 2 C2H5OH + 7 O2  4 CO2 + 6 H2O
3. Which type of reaction is described by the following equation?
2 C2H5OH + 7 O2  4 CO H2O
A. double-replacement
B. decomposition
C. single-replacement
D. combustion
REDOX?

12. Quick Quiz. Pb(NO3)2 + 2 NaCl  PbCl2 + 2 NaNO3
4. Which type of reaction is described by the following equation?
Pb(NO3)2 + 2 NaCl  PbCl2 + 2 NaNO3
A. synthesis
B. decomposition
C. double-replacement
D. single-replacement
REDOX?

13. Quick Quiz.
5. Balance the equation and describe it as a combination or decomposition reaction.
H2SO4  H2O2 + SO2
A. H2SO4  H2O2 + SO2 combination
B. H2SO4  H2O2 + SO decomposition
C. H2SO4  2H2O2 + SO2 combination
D. H2SO4  2H2O2 + SO2 decomposition
REDOX?