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Chemistry

Chemistry. Chemical Equations. What Is A Chemical Equation?. 4 Al(s) + 3 O 2 (g)  2 Al 2 O 3 (s) A chemical equation tells us what happens when a reaction takes place. This reaction is for the production of Aluminum Oxide. 4 Al(s) + 3 O 2 (g)  2 Al 2 O 3 (s).

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Chemistry

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  1. Chemistry Chemical Equations

  2. What Is A Chemical Equation? • 4 Al(s) + 3 O2(g)  2 Al2O3(s) • A chemical equation tells us what happens when a reaction takes place. • This reaction is for the production of Aluminum Oxide.

  3. 4 Al(s) + 3 O2(g)  2 Al2O3(s) • The numbers in front of the molecule or atoms is called its coefficient. It states how many need to react. • This reaction states that 4 aluminum atoms plus 3 oxygen molecules produce 2 molecules of Aluminum Oxide.

  4. 4 Al(s) + 3 O2(g)  2 Al2O3(s) The letters in parenthesis are the state of matter for each molecule. s – Solid g – Gas l - Liquid

  5. 4 Al(s) + 3 O2(g)  2 Al2O3(s) Reactants Products Products are on the right side of the arrow. Products are what we end up with. • Reactants are on the left side of the arrow. • Reactants are what we start with

  6. 4 Al(s) + 3 O2(g)  2 Al2O3(s) How many reactants do we have How many products do we have We have 2 Aluminum Oxide molecules. Each Aluminum Oxide molecules has 2 Aluminums and 3 Oxygens. So we have 4 Al atoms and 6 O atoms total. • 4 Aluminum atoms • 3 O2 molecules = 6 O atoms Our equation is balanced!

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