Antacids
Part of the Acids and Bases section of Coddy's Chemistry journey. Lesson 26 of 30.
Stomach acid is HCl, about pH 2. An antacid is a mild base that neutralizes the extra: Mg(OH)₂, Al(OH)₃, CaCO₃.
A carbonate gives off CO₂ as it neutralizes:
CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂
An antacid
Challenge
Chalk-based antacid tablets are calcium carbonate. Balance the equation for the tablet neutralizing stomach acid.
Try it yourself
Equation balancerBalance the equation
CaCO3HClCaCl2H2OCO2
Test yourselfThis lesson includes a short quiz. Start the lesson to answer it and track your progress.