Determination of Percent by Mass of NaHCO3 in Alka-Seltzer Tablets

Use the (really fun!) reaction between the sodium bicarbonate in Alka-Seltzer tablets and vinegar to explore stoichiometry, percent composition, and limiting reactants. This experiment is easily and safely reproduced at home using household materials and this $12 balance. Students also gain experience with data manipulation, error analysis, and graphical presentation in Excel. This laboratory can be modified to accommodate both high school and general chemistry undergraduate students.

Source material is found in Yueh-Huey ChenJing-Fun Yaung J. Chem. Educ. 2002, 79, 7, 848 Publication Date:July 1, 2002 https://doi.org/10.1021/ed079p848

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Natalie Ulrich

I’m a chemistry professor at Maryville University in St. Louis, MO. I teach general and organic chemistry, have three kids, and love to hike, fish, travel, and spend time with my family.

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