Synthesis and decomposition reactions

Learning goals We are learning to identify synthesis and decomposition reactions. We are learning to predict the products of synthesis and decomposition reactions.

Types of Chemical Reactions Most chemical reactions fall into the five families of reactions that we will be studying in our course: Synthesis Decomposition Single Displacement Double Displacement Combustion Today we will focus on the first two: synthesis & decomposition reactions.

Synthesis Reactions A + B AB Have the skeleton form: Two or more reactants combine to form a single product. A + B AB

Synthesis Rules 1. Metal + O2 Metal Oxide 2. Metal Oxide + H2O Two rules to follow for specific synthesis reactions: Examples: 1. Metal + O2 Metal Oxide 2. Metal Oxide + H2O Metal Hydroxide 2 Ca + O2 2 CaO Na2O + H2O 2 NaOH

Decomposition Reactions Have the skeleton form: A single reactant decomposes to form two or more products. AB A + B

Decomposition Rules 1. Metal Oxide Metal + O2 2. Metal Hydroxide Three rules to follow for specific decomposition reactions: Example: 1. Metal Oxide Metal + O2 2. Metal Hydroxide Metal Oxide + H2O 3. Metal Carbonate Metal Oxide + CO2 Calcium Carbonate Calcium Oxide + CO2

Example #1 Aluminium + Oxygen Given the reactants of the synthesis reaction below determine The complete word equation The balanced chemical equation Aluminium + Oxygen

Example #2 Iron (III) Carbonate Given the reactant of the decomposition reaction below determine The complete word equation The balanced chemical equation Iron (III) Carbonate

Learning goals We are learning to identify synthesis and decomposition reactions. We are learning to predict the products of synthesis and decomposition reactions.

Homework P.239 #1-4