Question

Antacids are taken to relieve heartburn or indigestion caused by excess stomach acid. The active ingredients vary depending on the brand, but all contain bases. Each Alka-Seltzer(R) tablet contains 1.916 g of the active ingredient sodium bicarbonate (NaHCO3). When it dissolves, the sodium bicarbonate reacts with stomach acid (essentially 0.100 M HCl) according to the reaction below:
HCl(aq) + NaHCO3(aq) ----> NaCl(aq) + CO2(g) + H2O(l)
How many milliliters of stomach acid can one tablet of Alka-Seltzer(R) neutralize?

Answer 1

each mole of HCl reacts with one mole of NaHCO3
so, how many moles of NaHCO3 do you have?
How many mL of 0.1M acid does that take?

Answer 2

1.916/84.008= 0.0228
but I'm not sure how to figure out how much it will neutralize

Answer 3

mols NaHCO3 = 0.0228 = mols HCl
But M HCl = mols HCl/L HCl. You know M and mols, solve for L and convert to mL.