Alka-Seltzer contains baking soda, which releases CO2 gas in water. The bubbling phenomenon is known as effervescence.

Alka-Seltzer contains baking soda, which releases CO2 gas in water. The bubbling phenomenon is known as effervescence.

By Janelle Montoya, Vincent Staverovsky and Yasmin Mazloom for Fall 2015 Team Third.
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