An antacid tablet containing of solid calcium carbonate is swallowed and reacts…
CHEMISTRY · Multi-part · A Level · Chemistry · Amount of substance · Amount of substance
Problem
An antacid tablet containing 1.50g of solid calcium carbonate is swallowed and reacts completely with gastric hydrochloric acid. Gastric fluid has a volume of 250mL and an initial concentration of 0.10M HCl. Assume the tablet dissolves entirely and that the system is open to the atmosphere so any gaseous products escape.
(1) Write a balanced chemical equation for the reaction that occurs in the stomach.
(2) Determine whether the ingested tablet is present in stoichiometric excess, limiting, or neither with respect to the acid. Show all calculations.
(3) Calculate the number of moles of CO2 gas evolved during the neutralization.
(4) Identify every reaction type applicable to the process and justify each classification by citing relevant chemical evidence from the reaction equation and your quantitative results.