Carbon+Dioxide+Content+in+Soda

This is the apparatus used to conduct the experiment. There are two Cokes, an inverted graduated cylinder, a large basin, a stopwatch, and a plastic square.

At the end of this experiment, the results from the Coke and Diet Coke collected were organized and compared. There were a total of four trials; two trials for Coke and Diet Coke at room temperature and two trials for a chilled temperature. In the first trial at room temperature, the Coke emitted 90.0 ml of carbon dioxide whereas the Diet Coke emitted 60.0 ml. After 15 minutes in the same trial, the Coke emitted only 34.0 ml of carbon dioxide and the Diet Coke 48.0 ml. After 30 minutes the number decreased once again and the Coke emitted 23.0 ml and the Diet Coke 38.0 ml. In the second room temperature trial, the amount of carbon dioxide emitted from Coke measured at 95.0, 36.0, and 27.0 ml all over a 30 minute time span. From the Diet Coke, the measurements were 55.0, 41.0, 29.0 ml. The results from the second room temperature trial (trial 3) were similar to the results from the first trial. In trial 2, the cool temperature trial, the Coke emitted 118, 28, and 13.8 ml of carbon dioxide over a time span of 30 minutes. The Diet Coke’s results came to be 90, 79, and 63.1 ml in that same trial. The second cool temperature trial (trial 4) resulted in numbers similar to those in the other trial for the Coke which were 99, 22.1, and 11.1. The numbers from the fourth trial for the Coke and the second were similar. For the Diet Coke, the carbon dioxide emission was 65, 54.8, 41.4 ml. By collecting these numbers, the results show how the amount of carbon dioxide emission in both room and cool temperatures differ between Coke and Diet Coke.
 * Results: **

Often times, carbon dioxide is used to sodas to create bubbles and fizzing which ultimately increase the taste of the soft drink. The purpose of this experiment was to determine the difference of carbon dioxide content between Coke and Diet Coke. It was hypothesized that the Coke will have a greater content of carbon dioxide and will emit carbon dioxide quicker than the Diet Coke when opened. To determine if this hypothesis is true, an apparatus set up using a basin filled with water, a graduated cylinder, and a rubber stopper with tubing helped determine which of the Cokes has a greater content of carbon dioxide. Once the Coke was opened, the rubber stopper was immediately put into the hole in order to collect the carbon dioxide. The amount of carbon dioxide collected was observed by watching the water level decrease in the inverted graduated cylinder. Significant digits were also used when recording data in order to have accurate results when using the graduated cylinder. In the end, the Diet Coke showed to emit more carbon dioxide overall and turned flat much slower than the regular Coke. The regular Coke emitted a large amount of carbon dioxide within the first couple minutes but that amount quickly decreased as time passed. Therefore, Diet Coke proved to have greater carbon dioxide content than Coke.
 * Carbon Dioxide Content in Coke and Diet Coke. Zina Pigorev. **

Key Words: Graduated Cylinder Significant Digits Carbon Dioxide Rubber Stopper


 * Article Summary: **

This article, taken from ajcn.com, assessed the association between long term consumption of several types of sodas and bone variables in children and adolescents. By using longe term dietary data from dietary records collected by 228 healthy children and adolescents, the experiment showed that longer term consumption of all soft drinks and un-caffeinated soft drinks was negatively associated with bone mineral content. The following beverage groups were considered for the experiment; all soft drinks including caffeinated and uncaffeinated, carbonated and uncarbonated, sports drinks, iced tea, and milk. To measure the bone and muscle variables, a pQCT was performed using an XCT-2000 device which has a low-energy X-ray tube. It was found that for both boys and girls, consumption of uncaffeinated soft drinks was higher than caffeinated and that long term consumption of all soft drinks was negatively associated with all bone variables like bone mineral content, cortical area, and polar strength strain. In conclusion, the negative association of soda consumption and bone mineral content could possibly increase the risk of osteoporosis and bone fractures as the children grow older.

Libuda, Lars. Alexy Ute. Thomas Remer. Peter Stehle. Eckhard Schoenau. Mathilde Kersting. “Association between long-term Consumption of Soft Drinks and Variables of Bone Modeling and Remodeling in a Sample of Healthy German Children and Adolescents” www.ajcn.org. Accessed 2/7/10.