How many moles of sodium bicarbonate are found from one Alka-Seltzer tablet?

Answer 1

To find this, we use the information on the chemical composition by mass of a tablet of alka seltzer. Per the drug label from Bayer, a single tablet contains 1000mg Citric Acid, 325mg Aspirin, and 1916mg Sodium Bicarbonate.

We then need to find the molecular weight of sodium bicarbonate (NaHCO₃), which comes out to 84g/mol.

To find the number of moles of sodium bicarbonate, we divide the mass of sodium bicarbonate in the tablet (1.916g) by the molar mass (84g/mol). This gives us 0.0228 moles of sodium bicarbonate in one tablet.