1. Balanced Chemical Equation:
The reaction of sodium hydrogen carbonate (NaHCO₃) with stomach acid (HCl) produces carbon dioxide (CO₂), water (H₂O), and sodium chloride (NaCl):
NaHCO₃ + HCl → CO₂ + H₂O + NaCl
2. Mole Ratio:
The balanced equation shows a 1:1 mole ratio between NaHCO₃ and CO₂. This means for every 1 mole of NaHCO₃ reacted, 1 mole of CO₂ is produced.
3. Calculate Moles of NaHCO₃:
* Molar mass of NaHCO₃ = 84.01 g/mol
* Mass of NaHCO₃ in the tablet = 2 grams
Moles of NaHCO₃ = (2 g) / (84.01 g/mol) = 0.0238 mol
4. Calculate Moles of CO₂:
Since the mole ratio is 1:1, the moles of CO₂ produced will be equal to the moles of NaHCO₃:
Moles of CO₂ = 0.0238 mol
Therefore, a typical antacid tablet containing 2 grams of sodium hydrogen carbonate should yield approximately 0.0238 moles of carbon dioxide.
