ER+SF

__**Title:**__ Rate of CO2 Released From Alka-Seltzer __**Hypothesis:**__ The finer the Alka-Seltzer and the warmer the water will react the quickest. 1) Drill a size 7 drill bit into the cap. 2) Force one side of the tubing into the hole. 3) Coat electric coating to the cap and tube. 4) Repeat until there is an airtight seal. 5) Tape other side of the aquarium tubing to the measuring device. 6) Now, prepare the Alka-Seltzer into whole pieces, halved pieces, 4 pieces, eight pieces, 8 pieces, and crushed. 7) Place the measuring device in large bowl of water upside down. Make sure there aren’t any air bubbles. 8) Put Alka-Seltzer into the water while putting on the cap and starting the timer. (Record the amount of carbon dioxide released every 10 seconds. 9) Repeat with warm water, 85 degrees Fahrenheit, and cold water, 40 degrees Fahrenheit.
 * __Problem:__** Daily, people depend on Alka-Seltzer for pain relief, but how can the Alka-Seltzer be manipulated into working faster?
 * __Procedure:__**

Log Book 11/18/2011 I’ve started to look at the materials I have and have realized that I will have to change my procedure. I have waited too long to get a rubber stopper. Instead, I will coat electric coating to the bottle and the aquarium tubing. 11/19/2011 I’ve started making my new procedure.- 1) Drill a size 7 drill bit into the cap. 2) Force one side of the tubing into the hole. 3) Coat electric coating to the cap and tube. 4) Repeat until there is an airtight seal. 5) Tape other side of the aquarium tubing to the measuring device. 6) Now, prepare the Alka-Seltzer into whole pieces, halved pieces, 4 pieces, eight pieces, 8 pieces, and crushed. 7) Place the measuring device in large bowl of water upside down. Make sure there aren’t any air bubbles. 8) Put Alka-Seltzer into the water while putting on the cap and starting the timer. (Record the amount of carbon dioxide released every 10 seconds. 9) Repeat with warm water, 85 degrees Fahrenheit, and cold water, 40 degrees Fahrenheit. 11/21/11 Today, I’ve finished my first three trials for the warm and cold water and found that the temperature of the water is the most significant part of this experiment. The warmer the water, the faster the reaction. 1/2/11 Today, I redid all of my trials so my results would be constant. I've found that the size of the Alka-Sletzer is insignificant compared to the temperature of the water. The water I used before was not exactly 40 degrees for the cold trials. The water I used before was warmer as apparent by the results of my cold water experiments before making the water exactly 40 degrees.

Materials

-A bowl to hold water. -A 150mL measuring device. -A thermometer to find temperature of water. -Hot and Cold water. 40 degrees Fahrenheit and 85 degrees Fahrenheit -Stopwatch -20 fluid once water bottle -70 Original Alka-Seltzer Tablets -Aquarium Tubing -Rubber Band -Electric Coating

SourceURL:file://localhost/Volumes/Cruzer/Science%20Fair%2010th%20Grade/Experimental%20Results.docx