The 7 Reaction Labs of Christmas

Types of Reactions:

• Synthesis: A + B -> AB        Example: N2 + H2 -> NH3
• Decomposition: AB -> A +B    
• Single Replacement: A + BC -> B + AC
• Double Replacement: AB + CD -> CB + AD
• Combustion: Fuel + O2 -> H2O + CO2

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Ok so the Labs went like this:

1. Fill 1/2 of a test tube with hydrochloric acid, place a piece of magnesium metal in the tube, and hold a second test tube over the tube containing the acid and magnesium. Hold the test tube on top until the reaction has stopped. Light a match and place it inside the inside of the top test tube.

• The Mg disappeared, and there was a loud popping noise when the match encountered the gas. 
• 2HCl + Mg -> H2 + MgCl2
• Sing Replacement Reaction

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     2. Light a Bunsen burner and take a small strip of Mg and hold it in the flames using a tongs.

• There was sparks and a bright flare of light. The Mg was reduced into a white powder. Overall, this was a very fast reaction.
• Mg2 + O2 -> 2(MgO)
• Synthesis Reaction

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      3. Shine a copper wire using a piece of sand paper, and using tongs, hold the wire in the flames of a   Bunsen burner for several minutes

• When you hold the copper in the fire long enough the flames turn green. The copper eventually began to melt.
• Cu + O2 -Heat> CuO
• Synthesis Reaction

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       4. Add a small amount of ammonium carbonate into a test tube, and using a test tube holder, hear the test tube. Waft the gas coming from the test tube towards your nose. 

• Starts to smell fine and even a little sweet, but the smell soon turns sour and smells like ammonia. The substance evaporated and their was vapor at the top of the test tube. 
• (NH4)2 + CO3 -> 2(NH3) + CO2 + H2O
• Decomposition Reaction

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      5.  Fill a test tube half full of hydrogen peroxide, then add a small amount of manganese dioxide. Using a test tube holder, hold a tube over the first tube. When the reaction is complete, hold the test tube upside down and place a glowing splint into the inverted test tube. 

• The mixture ended up turning black, and the stick relit in when it was entered into the tube. The smoke also settled at the bottom of the tube. 
• 2(H2O2) -MnO2> O2 + 2(H2O)
• Decomposition Reaction

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      6.  Pour a small amount of potassium iodide into a test tube, and then add in a small amount of lead (II) nitrate. 

• The reaction turned yellow.
• 2(KI) + Pb(NO3)2 -> KNO3 + PBI2
• Double Replacement Reaction

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     7. Place a small amount of copper (II) carbonate into a test tube. Heat the test tube while having a second inverted test tube over it in order to collect any gas given off. Light a wood splint and place it into the test tube that was on the top. 

• The calcium in the tube burned up. The smoke from the reaction collected at the bottom of the tube and the top of the tube seemed to be wet. 
• CuCO3 -Heat> CO2 + CuO
• Decomposition