Which Antacid Can Neutralize The Most Stomach Acid?

Science Fair Project Information
Subject: Medicine
Grade level: Elementary School - Grades 4-6
Academic Level: Ordinary
Project Type: Experimental
Cost: Low
Awards: None
Affiliation: Selah Intermediate School
Description: The experiment consists of a few vials with different types of antacids added to the water. A pH meter is used to show the neutralization effect by counting the number of drops of stomach acid (hydrochloric acid) droped into the vials until the pH reaches 7.0.
Link: http://www.selah.k12.wa.us/SOAR/SciProj99/NicoleSciProj.html