Consumer Chemistry: Properties of Antacids
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With the global population spending over a half a billion dollars a year on commercial antacids, several companies are out there competing for a part of the business. In this activity, students will learn about some of the more common active components in over-the-counter antacids as well as investigate the rate of acid neutralization of five different antacids. Students will also compare the buffering ability of three different calcium carbonate based antacids. Materials include: five 30 ml bottles of hydrochloric acid, 1M solution UN1789; two 30 ml bottles of universal indicator UN1170; two 30 ml bromothymol blue, 0.50% aqueous solution; 60 ml Antacid #5 (liquid); seven tablets each of Antacid #1, Antacid #2 Extra Strength, and Antacid #3; two packages of two Antacid #4 tablets; 15 graduated plastic pipettes; two packages of 50 universal indicator strips; and 90 disposable medicine cups. Contains enough materials for 15 groups. Grades 6-12.
