Types of Reactions.

By: Daniel and Kody

• Introduction/Background: There are five types of chemical reactions in chemistry. There is single displacement, double displacement, decomposition, synthesis, and combustion.

1. Single displacement involves two elements swapping spots in the product. One example is 2AL+3CuCl₂ ---- 2AlCl₃ +3Cu
2. Double displacement is a chemical reaction in which ions from two compounds interact in solution to form a product. One example is 2KL+Pb(NO₃ )_{2 -------} PbI₂ + 2KNO₃
3. Decomposition is a chemical reaction in which a single compound is broken down to produce two or more simpler substances. One example is

   CH₃OH ----- CO + 2H₂

4. Synthesis is a chemical reaction in which atoms or simple molecules combine to form a compound that is more complex. One example is

   6CO₂+6H₂O ---- C₆H₁₂O₆ + 6O₂

5. Combustion is a violent exothermic reaction, usually with oxygen, to form oxides. Carbon dioxide and water are always products. One example is

   C₂H₄ + 2O₂ ----- 2H₂O + CO₂

• The purpose of this lab is to observe different types of chemical reactions and record our observations and what kind of reactions they were. Then we have to write the balanced equations of each reaction.

• Procedure:
1. We obtained 3 small test tubes.
2. In the first test tube, we placed a piece of zince and about 1/2 mL of copper sulfate solution. We recorded our observations
3. In the second test tube we added about 1/2 mL Barium Nitrate solution to about of 1/2 mL of copper sulfate. We recorded our observations.
4. In the third test tube we placed a piece of magnesium ribbon. We added about 1/2 mL of HCl solution. We recorded observations.
   
5. We lighted a bunsen burner (burning propane gas, C₃H₈). We recorded observations of the flame.
6. We rinsed out the first test tube. Add about 2 mL Hydrogen Peroxide solution. We lightly heated it, and recorded our observations.
7. We added a pinched of Manganese (IV) oxide to the hydrogen Peroxide solution. Then we lightly heated it, and we recorded our observations

1. Safety Procedures:
• Apply goggles
• Apply apron
• Use test tube clamps
  

• Data Table Click on Table
• Data Analysis: The various types of reactions with their balanced equations are in the above data table. All types of reactions were present except for a synthesis reaction. Perhaps if we were to do this lab again we would try a synthesis or direct combination, as the old schoolers call it, reaction. This lab helped us identify what the types of reactions look like and how to properly balance them. This lab was quite informative
• Conclusion- The first reaction was a single displacement because a metal zinc replaced the metal copper in the product. The second reaction was a double displacement because two molecules switched position in the final product, the nitrate and the sulfate. In reaction 3 magnesium replaces hydrogen in the chemical reaction. In reaction five it is a combustion reaction because it is a hydrocarbon reacting with an oxygen to release carbon dioxide and water. The final reaction reaction is a decomposition reaction because the hydrogen peroxide breaks down into water and carbon dioxide. These are the types of reactions and why they are classified as so.