Use of Chlorine in Water PurificationLecture 9 | Chapter 13 | FSc 1st Year Chemistry

Use of Chlorine in Water Purification
Lecture 9 | Chapter 13 | FSc 1st Year Chemistry

In this lecture, we explain the use of chlorine in water purification in a clear, conceptual, and exam-oriented way according to the Punjab Textbook Board / PECTAA syllabus.

Chlorine plays a vital role in making drinking water safe and germ-free.

In this video, students will learn how chlorine kills bacteria, why HOCl (hypochlorous acid) is more effective than OCl⁻, and how pH affects disinfection power.
All reactions are explained step-by-step for board exams, MCQs, short questions, and conceptual understanding.

🔬 What You Will Learn in This Lecture
✔ Why chlorine is used in water purification
✔ Chemical reactions of chlorine with water
✔ Formation and role of hypochlorous acid (HOCl)
✔ Effect of pH on disinfecting action of chlorine
✔ Difference between chlorination and disinfection
✔ Advantages of chlorine over other disinfectants
✔ Board-exam focused points & short-answer tips

This lecture is highly useful for FSC 1st year students, competitive exams, and conceptual clarity. It is taught in a simple, logical, and teacher-friendly style, making it easy to remember and reproduce in exams.

📌 Recommended for:
FSc 1st Year Chemistry students | Board Exam Preparation | Conceptual Chemistry

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