1. Types of Reactions

2. Reminders: reactants  products
subscripts are used to balance charges in ionic compounds
Law of Conservation of Mass states that mass cannot be created or destroyed –BALANCE
diatomics: H2 O2 F2 Br2 I2 N2 Cl2
the only thing you can change in a chemical equation is the coefficients (numbers out front)

3. Types of Reactions: Synthesis:
Takes the general form:
A + B  AB
Definition: 2 elements/compounds come together to make a more complex compound.
What to look for: 1 PRODUCT

4. Predict the Products of a Synthesis Reacion:
Ca + O2 
Cu + S 
H2 + N2 

5. Types of Reactions: Decomposition
Takes the general from:
AB  A + B
Definition: An compound breaks down to elements/compounds.
What to look for: 1 REACTANT

6. Types of Reactions: Single Replacement
Takes the general form:
A + BC  B + AC
Definition: 1 single element replaces another in a compound which results in a new compound and a new single element.
What to look for: an element and compound in both the reactants and products

7. Predicting the Products of a Single Replacement Reaction:
Steps:
Determine the charge of all the elements in the reactants.
Determine which elements CAN switch places.
Look up the elements on the activity series.
If the single element is higher on THE LIST, the reaction will go to completion.

8. Activity Series
aka: THE LIST

9. Predicting the Products of a Single Replacement Reaction:
lithium + water 
chlorine + potassium iodide 

10. Types of Reactions: Double Replacement
Takes the general form:
AB + CD  AD + CB
Definition: cations (or anions) in 2 different compounds switch places to make 2 new compounds
What to look for: 2 compounds in the reactants and products

11. Predicting the Products of a Double Replacement Reaction:
Steps:
Determine the charges of all the ions in the compound.
Determine which elements can trade places.
Swap the elements and balance the chemical formula.
Balance the chemical equation.

12. Predicting the Products of a Double Replacement Reaction:
copper hydroxide + magnesium phosphate 
sodium carbonate + hydrochloric acid (HCl) 

13. Types of Reactions: Combustion
Takes the general form:
CxHy + O2  CO2 + H2O
Definition: a carbon compound and oxygen react to produce carbon dioxide and water
What to look for: carbon dioxide and water will ALWAYS be the products