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DETERMINATION OF SODIUM BICARBONATE IN ALKA-SELTZER Use the following data obtained in the analysis of an Alka-Seltzer tablet to make the calculations asked for below. They parallel those in the experiment to be performed. Data Mass of whole tablet 3.478 g Mass of tablet portion used in reaction 0.469 g Volume of flask 119.5 mL Initial pressure 757 torr Maximum pressure 1211 torr Temperature 21.7 °C Calculations (Show your work) 1. Moles CO₂ produced (remember 8.5 mg of CO₂ dissolves in the acid solution) 2. Moles NaHCOs used
Calculations (continued) 3. Mass NaHCO3 used 4. Mass % NaHCO3 in Alka-Seltzer 5. Calculated mass, in milligrams, of NaHCO3 per one tablet 6. On its label, the company claims 1904 mg NaHCO3 per tablet. Taking this to be the true value, what is the % error in the above experimental work?