1. CHEMICAL REACTIONS How can we determine if a reaction will occur? What are the different types of reactions? How can we predict the products of a reaction? What are solubility rules?

2. Will a reaction occur?  If a solid is formed (a precipitate)  If water is formed  If a gas is formed  If electrons are transferred Then it is likely that a chemical reaction took place.  Also, if a new odor is produced, a new color is produced, or a change in energy (temperature, light, sound) occurs it is likely that a reaction occurred.

3. Types of Chemical Reactions  Double Displacement (Precipitation)  Combustion  Single Replacement  Synthesis  Decomposition

4. Predicting Products of Double Replacement Reactions  If a solid forms from the combining of two aqueous solutions, a reaction has occurred.  For our purposes, we will assume that all double replacement reactions occur.  However, please know that if both products are soluble in water, there will be no reaction. You will not be asked to predict this.

5. Double Displacement Practice  Magnesium chloride solution is mixed with sodium carbonate solution (carbonate is CO 3 -2 )  Potassium chloride solution is mixed with a silver nitrate solution (nitrate is NO 3 -1 )  Sodium hydroxide (hydroxide is OH -1 )is mixed with an aluminum sulfate solution (sulfate is SO 4 -2 )

6. Predicting Products of Combustion  Always water and carbon dioxide  Is a type of redox

7. Single Replacement ( a type of Redox)  Use a metal activity series to determine if a reaction will occur.  If it will, cations trade places on the product side of the equation.  Ex. Mg + FeCl 2  MgCl 2 + Fe  Magnesium is more reactive than iron, so it replaces it and forms magnesium chloride

8. Synthesis ( a type of Redox)  Balance the charges of the reactants to form the product  Example: Mg + Cl 2  MgCl 2

9. Decomposition ( a type of Redox)  One reactant breaks into 2 or more products  Sometimes the component elements, but not always.  Examples:  2H 2 O  2H 2 + O 2  CuCO 3  CuO + CO 2