Chem Lab

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Chemistry Lab

The purpose of this lab is to see the physical and chemical properties of gases and to be able to use these properties to identify these gases.

To start I diluted 6M HCl by pouring 6ml of distilled water in a graduated cylinder. I added drop by drop 3ml of HCl directly from the bottle. The mixture was mixed well and the diluted 9ml solution was added to the test tube.

Hydrogen: I placed a place of Zn metal in the test tube with the diluted solution. I then capped the test tube with a rubber stopper with a short, straight plastic gas delivery tube through the center. The test tube was then placed into one of the wells on the well plate. The test tube had to be upright so it was necessary to wrap the tube with a piece of paper towel to hold it into place. Reaction was observed and recorded. A pipette bulb was filled with water and placed on top of the test tube’s gas delivery tube. The well plate with the test tube was placed in the tin while the gas displaced some of the water. When the water in the pipette was completely replaced by the gas I quickly removed it and placed my finger over the opening to prevent any gas from escaping. I lit a match and gently squeezed out some of the gas and observed and recorded the reaction. I then took a marker and marked 3 equal parts on the pipette. The pipette was again filled with water and placed on the gas generation tube like previously. When the bulb was 2/3 filled with gas it was removed and placed in a well with the opening done to be used later in the experiment. The test tube was taken apart and the items disposed of properly. The test tube was thoroughly cleaned for the next experiment.

Oxygen: A few pieces of Mn were placed into a clean test tube then I added hydrogen peroxide to fill the test tube leaving only 1 cm open at the top. The rubber…...

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