Predicting products of Chemical Reactions

Predicting Products Now that you know the general types of chemical reactions, you can predict what the products of a reaction will be when you are given the reactants. You will need to be able to write the correct formulas for the reactants by using the oxidation numbers of elements and polyatomic ions

Example #1 Predict the products of this reaction. H + O 1. What type of reaction is it? synthesis 2. Move the chemical symbols to represent a synthesis reaction. H + O  HO 3. Add subscripts to make the oxidation numbers of the elements in the product equal to zero. H 2 + O 2  H 2 O

Example #2: Predict the products of this reaction. BaCl 2 + Al 2 (SO 4 ) 3 1. What type of reaction is it? double displacement 2. Move the chemical symbols to represent a double displacement reaction. BaCl 2 + Al 2 (SO 4 ) 3  AlCl + BaSO 4 3. Add subscripts to make the oxidation numbers of the elements in the product equal to zero. BaCl 2 + Al 2 (SO 4 ) 3  AlCl 3 + BaSO 4

Example # 3: Write the correct formulas for the products of Al + CaO 1. What type of reaction is it? Single replacement 2. Move the chemical symbols to represent a double displacement reaction. Al + CaO  AlO + Ca 3. Add subscripts to make the oxidation numbers of the elements in the product equal to zero. Al + CaO  Al 2 O 3 + Ca