Leslie,+Michelle+and+A-lan

Michelle Kim, A-lan Woo, and Leslie Chan working together. Question - How does the temperature of soda water affect the solubility of carbon dioxide?

Aim - To test out what effect will happen to the carbon dioxide gas if we change the temperature of the soda water.

Independent Variable - Temperature of soda water Dependent Variable - Solubility of carbon dioxide

Background - The first carbonated drinks were the naturally carbonated waters produced from mineral springs. In 1772 the famous English chemist Joseph Priestley invented a process for artificially carbonating beverages. The title of his report was "Directions for Impregnating Water with Fixed Air in order to communicate to it the peculiar Spirit and Virtues of Pyrmont Water, And other Mineral Waters of a similar nature." (Carbon Dioxide was called "fixed air" in those days.) His discovery was so well received that the Royal Society awarded him the Copley Medal. To produce the carbon dioxide Priestley dripped sulfuric acid onto chalk. BONUS: I found a link to a experiment someone did that is similar to our experiment except it is with carbonated spring water instead of coca-cola http://chemse.oxfordjournals.org/cgi/content/abstract/16/4/337 feel free to check it out

Materials - Coca-cola, thermometer, 150ml beaker, electronic heater, balloon, rubberband, scale, test tube, glass bottle

Procedure - BEFORE the experiement, make sure you measure the balloon, rubberband, test tube weight, and add them all up for a total weight. 1. Pour out 150ml of Coca-cola into a beaker to make sure it is 150ml. 2. After making sure its 150ml, pour the coca-cola from the beaker into the glass bottle. 3. Measure the temperature with the thermomerter, and then place a balloon over the edge of the glass bottle. 4. Shake the glass bottle, until there is no more carbon dioxide coming out of the liquid (until the balloon is not increasing anymore). 5. Carefully transfer the balloon and place it over the head of the test tube, secure it with a rubberband (make sure you dont leak out any carbon dioxide) 6. Suck the carbon dioxide from the balloon into the test tube 7. Place the whole set (balloon, rubberband, test tube with carbon dioxide) onto the scale, and find out the weight with carbon dioxide. 8. Subtract the weight with carbon dioxide from the weight without carbon dioxide (the total weight of the first thing we found out) 9. Find out how many grams of carbon dioxide there is. 10. Repeat the same process except you heat up the coca-cola in the glass bottle before and find out the weight. 11. Do it with at least three different temperature. 12. After that, compare the outcomes.