Comparative_Study_of_Antacids_PPT.pptx..

chem 12

1. Comparative Study of Antacids Class XII Chemistry Project Session: 2025-26

2. Certificate This is to certify that ___________________________, student of class _________ has successfully completed the Chemistry project titled 'Comparative Study of Antacids' under the guidance of ___________________ during the year 2025-26 in partial fulfillment of the practical examination conducted by AISSCE, New Delhi.

3. Acknowledgement I would like to express my sincere gratitude to my Chemistry teacher, ___________________, for his/her guidance and encouragement. I am also thankful to the Principal, my parents, and my friends for their continuous support.

4. Introduction Acidity is a common problem caused by excess secretion of hydrochloric acid in the stomach. Antacids are bases that neutralize the excess acid and provide relief. This project compares the effectiveness of different antacids available in the market.

5. Aim & Objectives Aim: To compare the effectiveness of different antacids in neutralizing stomach acid. Objectives: 1. Study the chemical nature of antacids. 2. Observe neutralization reactions. 3. Compare neutralizing capacities. 4. Record observations and conclusions.

6. Theory Antacids are mild bases that neutralize stomach acid (HCl). Examples: HCl + NaHCO₃ → NaCl + H₂O + CO₂ 2HCl + Mg(OH)₂ → MgCl₂ + 2H₂O 2HCl + CaCO₃ → CaCl₂ + H₂O + CO₂

7. Principle & Apparatus Principle: Antacids neutralize excess HCl in the stomach. Apparatus: - Conical flask - Beakers - Test tubes - Burette & pipette - pH paper/indicator - Dilute HCl - Antacid tablets

8. Procedure 1. Crush antacid tablets. 2. Add to measured HCl solution. 3. Stir and check pH. 4. Record observations. 5. Repeat with different antacids.

9. Observations Antacid A → pH 6.0 → Good Antacid B → pH 5.5 → Average Antacid C → pH 7.0 → Excellent

10. Calculations Neutralization capacity = Volume of HCl neutralized / Mass of antacid Example: If 20 ml of HCl is neutralized by 1 g of Antacid A, its capacity is higher than one requiring more antacid for the same volume.

11. Result & Discussion Result: Antacid C was the most effective. Discussion: Effectiveness depends on chemical composition, solubility, and reaction rate of the antacid.

12. Conclusion The project showed that different antacids have varying effectiveness. Some neutralize acid better than others. Choice of antacid should be based on medical advice.

13. Bibliography 1. NCERT Chemistry Class XII 2. Modern’s ABC of Chemistry 3. Pharmaceutical Chemistry by Ashutosh Kar 4. Wikipedia.org 5. ScienceDirect.com