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

Frazier Nyasulu, Shadrick Paris, Rebecca Barlag

• 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.