i. 5 main types of reactions

2 substances combine to form a compound.Example:4Fe + 3O2 2Fe2O3

2 reactants 1 product

A COMPOUND BREAKS DOWN INTO 2 OR MORE SIMPLER SUBSTANCES

NH4NO3 N2O + H2O1 reactant More than 1

product

Rxn where 1 element takes the place of another

ExampleFe + CuSO4 FeSO4 + Cu

Element, compoundElement, compound

Rxn where the + portion of 2 ionic compounds are interchanged

Example:Pb(NO3) 2 + 2KI KNO3 + PbI2

compound, compound compound, compound

Rxn where a substance rapidly combines with Oxygen to form 1 or more oxides

Example:2C2H2 + 5O2 4CO2 + 2H2O + Energy

O is a reactant

1. Can change direction2. Equilibrium – rxn that

automatically reverses & there is no overall change in the amount of products or reactants.

3. Example:CaCO3(s) CaO(s) + CO2 (g)

limestone lime

4. The double arrow shows that the rxn can go either way.

5. Equilibrium can “disturbed” in order to increase the yield of desired product in a rxn.Example:CaCO3 CaO + CO2

a. If you take out the CO2 the rxn will shift right to produce more lime

b. Adding E can push a rxn to the left or right.1. Example:3C + 2Al2O3(s) + E 4Al + 3CO2

(g) Endo to the right Exo to the leftWhen you add more E, more product is formed.2. Example:N2 + H2 NH3 + E

Exo to the right Endo to the leftAdding more E pushes the rxn left

1. Activation Energy –the amt of E required to make a rxn occur

1. Raising temps2. Increasing Concentration- amt of a

substance present in a given volumeEx: fanning flames

3. If gases are involved, the rate of rxn can be increased by increasing pressure.

4. Increasing Surface Area- crushing or breaking substances into smaller pieces increase rxn rates.

5. Add a Catalyst – substance that speeds up the rxn rate without being permanently changed or used up itselfIn the body they are called enzymes

1. Do the opposite of any way to speed rxns up.

2. Inhibitor – slows a rxn without participating