1. Combination and Decomposition Reactions
Thermal decomposition of metal carbonates:
MCO3(s)  MO(s) + CO2(g)
Combination of two elements to form a compound
Zn + S  ZnS

2. Organic Reactions C3H8(g) + 5 O2(g)  3 CO2(g) + 4 H2O(l)
A. Combustion Reactions
Reaction with oxygen gas to form CO2 and H2O.
C3H8(g) + 5 O2(g)  3 CO2(g) + 4 H2O(l)
B. Substitution Reactions
Exchange of one atom or molecular fragment.

3. C. Addition Reactions
Addition of two molecules together.
D. Elimination Reactions
Ejection of a small molecule from a larger one.

4. E. Isomerization (Rearrangement) Reactions
Change of shape of a molecule without gain or loss of any atoms.

5. Balancing simple Oxidation-Reduction reactions

6. Which of the following species cannot function as an oxidizing agent?
a) MnO4–
b) Mn2+
c) H+
d) S
e) Br–
The sum of the oxidation numbers of all the atoms in the dichromate ion, Cr2O72–, is
a) –2.
b) 0.
c) +2.
d) +4.
e) +6.

7. What is the oxidation number of P in NH4H2PO4?
c) +1
d) +3
e) +5
The oxidation number of nitrogen given for all the following species is correct except
a) N2H4 (–2).
b) NH2OH (–1).
c) N2O (+1).
d) HN3 (–1).
e) HNO2 (+3).

8. Balancing complex RedOx equations in acidic and basic media
The following reaction occurs in basic solution. What is the sum of the lowest whole-number coefficients in the balanced equation?
____ MnO4– + ____ NH3 → ____ NO3– + ____ MnO2

10. When the following oxidation–reduction reaction is balanced with lowest
whole-number coefficients in acidic solution, what is the coefficient for Mn2+(aq)?
___MnO4–(aq) + ___C2H5CHO(aq) → ___Mn2+(aq) + ___C2H5COOH(aq)