- 1). Remove the label from the club soda. Prepare the bottle for the experiment by allowing it to cool in the refrigerator for 5 hours.
- 2). Pour a layer of ice into the bottom of a large bowl. Sprinkle rock salt over the ice.
- 3). Place the bottle of club soda in the middle of the bowl. Layer ice and rock salt around it.
- 4). Put a thermometer in the bowl next to the bottle of soda. When the soda reaches -8 degrees Celsius or 17 degrees Fahrenheit, let the bottle sit for 10 minutes. Do not allow the temperature to go lower than -8 degrees Celsius or 17 degrees Fahrenheit or the soda will freeze before the experiment is done.
- 5). After 10 minutes, remove the bottle from the ice. The soda will be in liquid form. Now remove the lid from the soda. Notice how the soda immediately freezes due to the carbon dioxide releasing from the soda. Ice crystals will appear at the top of the bottle and advance to the bottom. On the website stevespanglerscience.com, Joe Franek of the Chemistry Department at the University of Minnesota said, "Opening the bottle allows carbon dioxide bubbles to form, and these bubbles provide a place for the nucleation of the ice crystals to begin occurring."
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