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Tests for Gases

Laboratory Report:
 

Observations:

  1. Some gases were collected using the following reactions. 

  2. Flame tests were performed on the gases collected and the results are reported below.

  3. Hydrogen gas was produced by reacting calcium metal with water or magnesium metal with hydrochloric acid.  In both cases the gas was collected using the downward displacement of water.

  4. Oxygen gas was collected by decomposition of Hydrogen Peroxide, using Manganese Dioxide as a catalyst. The gas was collected using the upward displacement of air.

  5. Carbon dioxide was collected by decomposition of Sodium Carbonate (Alka-Seltzer) in water. The downward displacement of water was used to collect the gas.

GAS Physical Properties Test (s) Test Result
Hydrogen odourless, colourless, less dense than air Burning wood splint Burns with a light blue flame
explosive -- "pop sound" heard
Oxygen odourless, colourless, less dense than air Glowing wood splint Glowing splint burst into flames
Carbon Dioxide odourless, colourless, more dense than air Burning Wood Splint
Clear Limewater Solution		 Flame goes out
Limewater turns cloudy

Analysis Exercise:

  1. Print this page and complete the following table.
Gas Inferences Chemical Properties
Hydrogen    
Oxygen    
Carbon Dioxide    

2.    Draw your Conclusions: