Learning objective
Explain the use of chlorine in water treatment.
Read the explanation, check the common trap, then practise with flashcards and questions.
At a glance
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Flashcards
0
Questions
Topic
Group 7(17), the halogens
Subtopic
Halide ions and uses of chlorine
Study support
Understand this objective
Quick explanation
Explain the use of chlorine in water treatment
- This point belongs to Group 7(17), the halogens, especially Halide ions and uses of chlorine.
- You need to be able to explain the use of chlorine in water treatment.
- The key ideas to know are water treatment and chlorine.
- Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.
Key concepts
Why it matters
This objective helps connect Halide ions and uses of chlorine to exam-style questions, flashcards, and revision notes for Group 7(17), the halogens.
Quick student answer
What is the primary role of chlorine in water treatment?
Direct answer
To kill bacteria and other pathogens
Key terms
- Disinfection: The process of eliminating or reducing harmful microorganisms from a surface or substance, particularly in water treatment.
- Hypochlorite: An ion (OCl-) formed when chlorine reacts with water, which is used as a disinfectant in water treatment.
Common trap
Confusing chlorine with chloramine: Remember that chlorine is a strong disinfectant, while chloramine is a more stable compound formed when chlorine reacts with ammonia, used for longer-lasting disinfection.
Related questions
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Question 1 of 3
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Flashcard prompts
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Revision tools
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Flashcards0 linked cards
Practice Questions0 linked questions
Revision notestopic notes
Open the full topic revision notes when you are ready to review this objective in context.
Open revision notesRelated learning objectives
- Describe trends in electronegativity and boiling point down Group 7.
Halogen trends and displacement
- Explain the trend in oxidising ability of halogens.
Halogen trends and displacement
- Predict and explain halogen displacement reactions.
Halogen trends and displacement
- Write ionic equations for halogen displacement reactions.
Halogen trends and displacement
- Describe tests for halide ions using silver nitrate and ammonia.
Halide ions and uses of chlorine