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1. To Determine Which Antacid Could
Neutralize the Most Stomach Acid
• Name: [Your Name]
• Class: [Your Class]
• Roll No: [Your Roll No]
• School: [Your School Name]

2. Aim
• To compare different antacid tablets and
determine which one is most effective in
neutralizing stomach acid.

3. Certificate
• This is to certify that [Your Name], a student of
Class [Your Class], has successfully completed
the Chemistry project titled 'To Determine
Which Antacid Could Neutralize the Most
Stomach Acid' under the guidance of
[Teacher's Name].

4. Acknowledgement
• I would like to express my sincere gratitude to
my chemistry teacher, school principal, and
my parents for their support in completing this
project.

5. Index
• 1. Aim
• 2. Certificate
• 3. Acknowledgement
• 4. Index
• 5. Objective
• 6. Introduction
• 7. Theory
• 8. Materials Required
• 9. Experiment

6. Objective
• 1. To test the neutralizing ability of different
antacids.
• 2. To understand acid-base reactions in the
digestive system.
• 3. To identify the most effective antacid using
a scientific approach.

7. Introduction
• Antacids are substances that neutralize
stomach acid.
• Common compounds: Mg(OH)₂, CaCO₃,
NaHCO₃.
• Reaction: Acid (HCl) + Base → Salt + Water

8. Theory
• Neutralization reaction: Acid + Base → Salt +
Water.
• Stomach acid: HCl (pH ~1.5 to 3.5).
• An ideal antacid increases the pH towards 7.

9. Materials Required
• • Antacid tablets (e.g., Digene, Eno, Gelusil)
• • Hydrochloric acid or vinegar
• • Beakers, measuring cylinders
• • Burette or dropper
• • pH paper or meter
• • Distilled water, stirrer

10. Experiment
• 1. Crush antacid tablets and dissolve in fixed
water.
• 2. Add measured HCl drop by drop.
• 3. Measure pH changes.
• 4. Record acid volume neutralized until pH ~7.

11. Observations
• Antacid | Volume of Acid Neutralized (ml) |
Final pH | Remarks
• Eno | 18 | 6.5 | Moderate
• Digene | 25 | 7.0 | Most effective
• Gelusil | 20 | 6.8 | Effective

12. Calculations
• Compare volumes of acid neutralized.
• Optional: Calculate moles of HCl neutralized.
• Analyze pH readings.

13. Result
• Digene neutralized the most acid, hence is the
most effective antacid among those tested.

14. Precautions
• • Use accurate measurements.
• • Crush tablets uniformly.
• • Clean apparatus.
• • Handle acids with care.

15. Bibliography
• • NCERT Chemistry Textbook
• • Khan Academy
• • BYJU’S
• • Antacid product labels
• • Teacher's guidance