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The purpose of the experiment is to determine the amount of CO2 present in a contained space. Using alka-seltzer tablets to control the amount of CO2, which will be an independent factor.

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Introduction

Internal Assessment- CO2 Factor Lab Purpose: The purpose of the experiment is to determine the amount of CO2 present in a contained space. Using alka-seltzer tablets to control the amount of CO2, which will be an independent factor. The container a 100ml beaker will be the location this occurs, which will be covered with a piece of foil. The amount of water will change accordingly and therefore see which beaker contains the most CO2. I believe that the beaker with the least amount of water will contain the most CO2 because there is more space for CO2 to form. Materials: -Alka-seltzer tablets (10) -Beaker -Pipette -Foil -Distilled water -Stopwatch -Bromythol Blue Procedure: - First fill a beaker with 5ml, using the pipette, of distilled water and then add two alka-seltzer tablets. ...read more.

Middle

- Before this process should occur, the bromythol blue should be added to a beaker with only distilled water and no Co2, this will be the control to compare the trials to. Data: Test #1 Time: 15 seconds Trials: Amount of CO2: Amount of water: 1 (A description of the color) 5ml 2 10ml 3 15ml 4 20ml 5 25ml Test #2 Time: 15 seconds Trials: Amount of CO2: Amount of water: 1 5ml 2 10ml 3 15ml 4 20ml 5 25ml Test #3 Time: 15 seconds Trials: Amount of CO2: Amount of water: 1 5ml 2 10ml 3 15ml 4 20ml 5 25ml Test #4 Time: 15 seconds Trials: Amount of CO2: Amount of water: 1 5ml 2 10ml 3 15ml 4 20ml 5 25ml Test ...read more.

Conclusion

By doing a lot more tests most of these small errors can be avoided and make this experiment more accurate. To better control the variables, such as gas escaping the beaker would be to do it in an enclosed area that measure the amount of Co2 in the specific area. For example, a highly sensitive machine that scans the amount of CO2 can be used so that it is more accurately recorded. There also could be other methods of recording Co2 and many better ways to get Co2 then in an alka-seltzer tablet, and these factors could have severely hindered the overall experiment. Overall my hypothesis was not accurate, the more water touched the surface of the tablets the more carbon dioxide was given off, so therefore the 25ml of water was the amount the expelled most of the Co2 from the tablet. ...read more.

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