Combination and Decomposition Reactions Thermal decomposition of metal carbonates: MCO 3 (s)  MO(s) + CO 2 (g) Combination of two elements to form a compound Zn + S  ZnS

Organic Reactions A. Combustion Reactions Reaction with oxygen gas to form CO 2 and H 2 O. C 3 H 8 (g) + 5 O 2 (g)  3 CO 2 (g) + 4 H 2 O(l) B. Substitution Reactions Exchange of one atom or molecular fragment.

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

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

Balancing simple Oxidation-Reduction reactions

Which of the following species cannot function as an oxidizing agent? a)MnO 4 – b)Mn 2+ c)H + d)S e)Br – The sum of the oxidation numbers of all the atoms in the dichromate ion, Cr 2 O 7 2–, is a)–2. b)0. c)+2. d)+4. e)+6.

What is the oxidation number of P in NH 4 H 2 PO 4 ? a)–3 b)0 c)+1 d)+3 e)+5 The oxidation number of nitrogen given for all the following species is correct except a)N 2 H 4 (–2). b)NH 2 OH (–1). c)N 2 O (+1). d)HN 3 (–1). e)HNO 2 (+3).

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? ____ MnO 4 – + ____ NH 3 → ____ NO 3 – + ____ MnO 2

When the following oxidation–reduction reaction is balanced with lowest whole-number coefficients in acidic solution, what is the coefficient for Mn 2+ (aq)? ___MnO 4 – (aq) + ___C 2 H 5 CHO(aq) → ___Mn 2+ (aq) + ___C 2 H 5 COOH(aq)