1. Types of Reactions

2. Two or more elements combine to form a compound
Synthesis
Two or more elements combine to form a compound
A + B → AB

3. synthesis Practice: Classify the following reactions.
____________________ H2(g) + Cl2g) → 2HCl(g)
____________________ AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq)
____________________ 2Ag2O(s) + heat → 4Ag(s) + O2(s)
____________________ C5H12(l) + 8O2(g) → 5CO2(g) + 6H2O(l)
____________________ Cl2(aq) + 2KI(aq) → I2(aq) + 2KCl(aq)
____________________ HCl(aq) + NaOH(aq) → H2O(aq) + NaCl(aq)
synthesis

4. Decomposition
A single compound breaks down into simpler substances (“reverse synthesis”)
AB → A + B

5. synthesis decomposition Practice: Classify the following reactions.
____________________ H2(g) + Cl2g) → 2HCl(g)
____________________ AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq)
____________________ 2Ag2O(s) + heat → 4Ag(s) + O2(g)
____________________ C5H12(l) + 8O2(g) → 5CO2(g) + 6H2O(l)
____________________ Cl2(aq) + 2KI(aq) → I2(aq) + 2KCl(aq)
____________________ HCl(aq) + NaOH(aq) → H2O(aq) + NaCl(aq)
synthesis
decomposition

6. A + BX → B + AX Single Replacement
An element reacts with an ionic compound and replaces one element in that compound
A + BX → B + AX

7. synthesis decomposition single replacement
Practice: Classify the following reactions.
____________________ H2(g) + Cl2g) → 2HCl(g)
____________________ AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq)
____________________ 2Ag2O(s) + heat → 4Ag(s) + O2(s)
____________________ C5H12(l) + 8O2(g) → 5CO2(g) + 6H2O(l)
____________________ Cl2(aq) + 2KI(aq) → I2(aq) + 2KCl(aq)
____________________ HCl(aq) + NaOH(aq) → H2O(aq) + NaCl(aq)
synthesis
decomposition
single replacement

8. Two ionic compounds react and two metals (or non-metals) switch places
Double Replacement
Two ionic compounds react and two metals (or non-metals) switch places
AX + BY → AY + BX

9. synthesis double replacement decomposition single replacement
Practice: Classify the following reactions.
____________________ H2(g) + Cl2g) → 2HCl(g)
____________________ AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq)
____________________ 2Ag2O(s) + heat → 4Ag(s) + O2(s)
____________________ C5H12(l) + 8O2(g) → 5CO2(g) + 6H2O(l)
____________________ Cl2(aq) + 2KI(aq) → I2(aq) + 2KCl(aq)
____________________ HCl(aq) + NaOH(aq) → H2O(aq) + NaCl(aq)
synthesis
double replacement
decomposition
single replacement

10. HA + BOH → AB + H2O Neutralization
A special type of double replacement where an acid reacts with base to produce salt and water
HA + BOH → AB + H2O

11. synthesis double replacement decomposition single replacement
Practice: Classify the following reactions.
____________________ H2(g) + Cl2g) → 2HCl(g)
____________________ AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq)
____________________ 2Ag2O(s) + heat → 4Ag(s) + O2(s)
____________________ C5H12(l) + 8O2(g) → 5CO2(g) + 6H2O(l)
____________________ Cl2(aq) + 2KI(aq) → I2(aq) + 2KCl(aq)
____________________ HCl(aq) + NaOH(aq) → H2O(aq) + NaCl(aq)
synthesis
double replacement
decomposition
single replacement
neutralization

12. CxHyOz + O2 → CO2 + H2O Combustion
An organic compound (C, H, sometimes O) burns in oxygen to give carbon dioxide and water
CxHyOz + O2 → CO2 + H2O

13. synthesis double replacement decomposition combustion
Practice: Classify the following reactions.
____________________ H2(g) + Cl2g) → 2HCl(g)
____________________ AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq)
____________________ 2Ag2O(s) + heat → 4Ag(s) + O2(s)
____________________ C5H12(l) + 8O2(g) → 5CO2(g) + 6H2O(l)
____________________ Cl2(aq) + 2KI(aq) → I2(aq) + 2KCl(aq)
____________________ HCl(aq) + NaOH(aq) → H2O(aq) + NaCl(aq)
synthesis
double replacement
decomposition
combustion
single replacement
neutralization

14. Challenge: Predict the Products of each reaction.
___ Fe + ___ O2 → _______________________________
___ Al2O3 → _______________________________
___ C3H8 + ___ O2 → _______________________________
___ Al(OH)3 + ___ K2S → _______________________________
___ Mg + ___ HNO3 → _______________________________
___ H2SO4 + ___ KOH → _______________________________
___ FeCl2 + ___ LiOH → _______________________________
___ KBr + Cl2 → _______________________________