Properties of Gases - Chem Labpaq Essay

689 Words Feb 22nd, 2013 3 Pages
Properties of Gases

General Chemistry 1
Lab 5

Abstract:
The purpose of this experiment is to examine the properties of several gasses, which were the products of a reaction, and examine the way the gasses react under certain conditions. These conditions, such as introducing a flame to the gas as well as oxygen and CO2, caused other reactions to occur.
Hypothesis:
If the gasses are correctly synthesized then there will be a clear reaction with the introduction of the flame, O2, CO2, Air, limewater, and Bromthymol indicator.
Procedures:
Step 1. I placed a small amount of Mossy Zn in the test tube and then added HCL. I used the rubber stopper and a pipet bulb to collect the Hydrogen gas synthesis. I filled the pipet bulb with
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(Step 4 cont.) I combined baking soda and vinegar again and attached the stopper with copper and plastic tubing assembly. I added a few ml of limewater to a well of my well plate and ran the CO2 through the tube of the gas assembly through the limewater, which caused it to turn a cloudy color and possibly produce a precipitate. Using the same gas assembly technique, I ran the CO2 through a few ml bromothymol blue in the well plate as well. When the gas contacted the bromothymol, it turned from blue to yellow then to a murky green.
Step 5. I added a few pieces of Alka Seltzer to the gas delivery tube and added water to create the gas reaction. Using the gas assembly C&P tube, I ran this gas synthesis through the limewater in the well plate, which turned the limewater from hazy to clear.
Step 6. I put some of the limewater in the test tube and with the straw, I breathed through the limewater. This had the opposite effect of the Alka seltzer gas as the breath caused the limewater to turn hazy.
Analysis:
(Results included in my procedures) The hydrogen was proven to be combustable. The oxygen was proven to be flameable. No reaction with the hydrogen and oxygen mixture which may have been an experimental error caused by (unknown). Carbon dioxide extinguished the flame, turned the limewater cloudy, and altered the ph of the bromothymol. Alka Seltzer turned the limewater clear. Breath turned the limewater hazy.
Conclusion:
Since I

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