An antacid tablet contains sodium hydrogen carbonate, NaHCO3, and inert ingredients. A 0.500-g sample of powdered tablet was mixed with 50.0 mL of 0.190 M HCl (hydrochloric acid). The mixture was allowed to stand until it reacted.
NaHCO3(s) + HCl(aq) → NaCl(aq) + H2O(l ) + CO2(g)
The excess hydrochloric acid was titrated with 47.1 mL of 0.128 M NaOH (sodium hydroxide).
HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)
What is the percentage of sodium hydrogen carbonate in the Antacid