Plop Plop Fizz Fizz

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Name______________________________ Date _________________ Block _______ Plop-Plop Fizz-Fizz Lab Problem: Does the physical size of an Alka-seltzer tablet effect how fast it dissolves? Background: The idea came from a newspaper editor in Elkhart, Indiana, in the 1920s and was brought to the public by Hub Beardsley, president of the Dr. Miles Laboratories (now Miles Laboratories). Beardsley learned that an entire newspaper staff had remained free of influenza during an epidemic when they took the editor's prescription of aspirin and baking soda. Beardsley knew he had found a moneymaking product. Launched in 1931, the tablet was a nationwide success before the end of the decade. The fizzing you see when you drop an Alka-Seltzer tablet in water is the same sort of fizzing that you see from baking powder. A baking powder reaction is caused by an acid reacting with baking soda (sodium bicarbonate). In school, you probably tried an experiment where you mixed baking soda with vinegar to see it foam. That's what is happening in baking powder. If you look at the ingredients for Alka-Seltzer, you will find that it contains citric acid and sodium bicarbonate (baking soda). When you drop the tablet in water, the acid and the baking soda react -- this produces the fizz. You can think of an Alka-Seltzer tablet as compressed baking powder with a little aspirin mixed in. Materials: |3 Clear glasses |6 Alka-Seltzer tablets |Mortar and pestle | |Stopwatch | | | Hypothesis: I think _____________________________________________________ Because______________________________________________________ Identify the variables:
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