Types of Reactions We can abbreviate Reaction to Rxn

Reactants and Products Reactants are the chemicals that react – they are on the left side of the equation Products are the chemicals that are produced – they are on the right side of the equation Reactant + Reactant => Product + Product

There are 5 types of Rxn 1. Combination Reaction 2. Decomposition Reaction 3. Single Replacement Reaction 4. Double Replacement Reaction 5. Combustion Reaction

Combination Reaction A + B => AB Two or more substances react and combine to form a single substance Also called a Synthesis Reaction 2 H 2 + O 2 => 2 H 2 O

Decomposition Reaction AB => A + B A single compound reacts to form two or more simpler products. 2 NI 3 => N I 2

Boom!!!!

Single Replacement Reaction A + BC => AC + B Atoms of an element replace the atoms of a second element in a compound Zn + H 2 SO 4 => H 2 + ZnSO 4

The higher it is the more reactive. Metals from Li to Na will replace H from acids and water. Metals from Mg to Pb will replace H from acids only.

Double Replacement Reaction AB + CD => AD + CB Positive ions are exchanged between two compounds. NaOH + HCl => NaCl + H 2 O

Calcium carbonate (marble) and Sulfurous Acid (acid rain)

Combustion Reaction C x H y + O 2 => CO 2 + H 2 O Oxygen reacts with another substance – producing energy (heat and light) – and usually carbon dioxide and water. CH 4 + O 2 => CO 2 + H 2 O 2 CH 3 OH + 3 O 2 => 2 CO H 2 O

Putting out a Fire (Combustion) If you need a Fuel and Oxygen to have combustion – how many ways are there to stop combustion. 1. Stop the Fuel 2. Stop the Oxygen 3. Reduce the energy so it cannot support the initiating energy. (ignition point) Fahrenheit 451 –Read Fahrenheit 451 by Ray Bradbury

Disclaimer Aloha I put together these power points for use in my science classes. You may use them in your classes. Some images are public domain, some are used under the fair-use provisions of the copyright law, some are mine. Copyright is retained by the owners! Ted Brattstrom