Predicting products of Chemical Reactions

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Predicting products of Chemical Reactions
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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

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Example 1

• Predict the products of this reaction.     H O

1. What type of reaction is it? synthesis
2. Move the chemical symbols torepresent a synthesis reaction. H O ? HO
3. Add subscripts to make the oxidation numbers of the elements in the product equal to zero. H2 O2? H2O
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Example 2

• Predict the products of this reaction.    
• BaCl2 Al2(SO4)3

1. What type of reaction is it? double displacement
2. Move the chemical symbols to represent a double displacement reaction. BaCl2 Al2(SO4)3 ? AlCl BaSO4
3. Add subscripts to make the oxidation numbers of the elements in the product equal to zero. BaCl2 Al2(SO4)3 ? AlCl3 BaSO4
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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 ? Al2O3 Ca