Wash Bottle Laboratory Exercises:: Mass of NaHCO3 in an Alka-Seltzer Tablet, Molar Mass of CO2, and the Ideal Gas Law Constant

• Autores: Frazier Nyasulu, Shadrick Paris, Rebecca Barlag
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 86, Nº 7 (July), 2009, págs. 842-844
• Idioma: inglés
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• Resumen

  • We describe a wash bottle water displacement setup used to determine the mass of NaHCO3 in an Alka-Seltzer tablet, the molar mass of CO2, and the ideal gas law constant, all these being determined from a single experimental trial. Since a typical trial takes 10–15 minutes, multiple trials are performed (N = 5) and the 95% confidence intervals of the mean are calculated. Students' results are precise and accurate.