Reaction Lab

Introduction:

• Synthesis: ( Direct combustion) two or more substances combine to form a single product. Example~Hydrogen gas and oxygen gas burn to produce water. 2H2+O2 2H2O

• Decomposition: Substance breaks down into two simpler substances. Example~potassium chlorate when heated comes apart into oxygen gas and potassium chloride. 2 KClO3 2 KCl + 3 O2

• Single Displacement (Replacement): one element fakes place of another in a compound. Example~Aluminum and iron trioxide.

• Double displacement (Replacement): positive and negative of two ionic compounds interchange. Example~calcium chloride and silver nitrate are reacted to form insoluble silver chloride.
  

• Combustion: Rapidly combines with oxygen to form oxides and release energy. Example~Hydrocarbon plus oxygen forms carbon dioxide and water.
  

Purpose:

• The purpose of this lab is to be able to see and identify the 5 chemical reactions rather than just being told what they are and what they do.
  

Materials:

• Safety Goggles
• Safety Apron
  
• 4 small test tubes
• Zinc
• CuSO4
• Ba(No3)2
• Magnesium ribbon
• Bunsen burner
• Striker
• Test tube clasp
• H2O2
• MnO2
• test tube rack

Procedure:

1. Put on Safety Gear.
   
2. Obtain 4 small test tubes.
3. In the first test tube, place a piece of zinc and about 1/2 mL of CuSO4 solution. Record observations.
4. In the second test tube add about 1/2 mL Ba(NO3)2 solution to about 1/2 mL of CuSO4 solution. Record Observations.
   
5. In the third test tube place a piece of magnesium ribbon. Add about 1/2 mL of HCl solution. Record Observations.
6. Light a Bunsen burner (burning propane gas, C3H8). Record observations of the flame.
7. In the fourth test tube add about 2 mL H2O2 solution. Lightly heat it. Record Observations.
   
8. Add a pinch of MnO2 (catalyst) to the H2O2 solution. Lightly heat it. Record observations.

Data:

Observations	Reaction Type	Equation	Evidence of Reaction
Metal changed color, started to dissolve, and sentiment at the bottom of the test tube.	Single Displacement	Zn + CuSO4 => Cu + ZnSO4	Formation of Copper
Temperature stayed the same, color combined, and a lot of bubbles.	Double Displacement	Ba(NO3) 2 + CuSO4 => Cu(NO3) 2 + BaSO4	Color/ Precipitate
Sizzling sound, dancing metal, a lot of bubbles, high temperature, and precipitate in the test tube	Single Displacement	Mg + 2HCl => H2 + MgCl2	Hydrogen Gas
Blue at the bottom and orange on the top	Combustion	C3H8 + 5O2 => 3CO2 + 4H2O	Flame
Lots of bubbles, foggy [Picture Unavailable]	Decomposition	2H2O2 => 2H2O + O2	Splint
Lots of bubbles, molecules rising, still bubbling after heating, smell, smoky, light grey. Picture Unavailable]	Decomposition	2H2O2 + MnO2=> 2H2O + MnO2 + O2	Splint

Discussion:
Through this entire experiment we are more capable of understanding the reactions, for we can now connect it with a visual presentation. This caused us to think more logically as we had to come up with our own equations and decided with reaction was being presented.

Conclusion:
Through each individual experiment we saw one of the 5 reactions and evidence of these reactions. We were capable of identifying the reactions from this evidence. The reaction descriptions, type, equation, and evidence of the reaction were placed in a data table for a presentation of the information that is more pleasing to the eye.