Chemical Reactions Objectives
 1.Classify and name compounds in chemical reactions
 2.Describe chemical reactions in word and chemical 
  equations.
 3.Balance chemical equations based on the Law of 
  Conservation of Mass.
 4.Identify and classify types of chemical reactions 
  and energy changes involved.
 5.Predict products and energy changes in a chemical 
  reaction. 
 6.Identify and test factors that affect the rate of 
  chemical reactions.
      Chemical Reactions
  What is a chemical reaction?  
  • Use your background knowledge to explain 
   what a chemical reaction is.
  • Think about chemical changes you have 
   observed in your surroundings.
  • Think about chemical changes on an atomic 
   level.  
      Chemical Reactions
 • Substances chemically interact to form different 
  substances. 
 • A substance can be an element or a compound.
 • Chemical bonds are broken and created.
 Example:        
  Iron chemically reacts with Oxygen to produce Iron(II) Oxide
                       
         Chemical Equations
          Fe   + O   ------>    FeO
          2          
 Reactants:  
 • Starting substances.
 • Chemically interact with one another.
 • Usually located to the left of the arrow.
 Products:
 • Ending substances.
 • Substances formed from the chemical reaction.
 • Usually located to the right of the arrow.
                 Chemical  Equations
           Fe    + O       ------>    FeO
             (s)      2 (g)                   (s)
  • (s)=  substance in solid state
  • (g)= substancein gaseous state
  • (l)= substance in liquid state
  • (aq)= substance dissovled in water.
  (aqueous solution)