Learning objective

Describe sterilisation as part of potable water treatment.

Read the explanation, check the common trap, then practise with flashcards and questions.

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At a glance

Flashcards

Questions

Topic

Using the Earth's resources and obtaining potable water

Subtopic

Potable water

AQA GCSE ChemistryUsing resources

Study support

Understand this objective

Short explanation

Sterilisation is a crucial step in the treatment of potable water, ensuring it is safe for human consumption. This process involves the removal or destruction of harmful microorganisms, including bacteria and viruses, that can cause illness. Common methods of sterilisation include the use of chlorine, which effectively kills pathogens, ozone, which is a powerful oxidant, and ultraviolet light, which disrupts the DNA of microorganisms. The choice of sterilisation method may depend on the specific water source and local conditions, as each method has its advantages and limitations in terms of effectiveness and safety.

Key concepts

sterilisationpotable water

Why it matters

This objective helps connect Potable water to exam-style questions, flashcards, and revision notes for Using the Earth's resources and obtaining potable water.

Common mistakes

1 linked

Confusing Sterilisation Methods: Do not treat this as a general statement about potable water. Instead, answer by clearly linking the correction to describe sterilisation as part of potable water treatment in Potable water. This keeps the response inside Using the Earth's resources and obtaining potable water and prevents a vague or off-topic GCSE answer. The mistake to avoid is: students often confuse sterilisation methods for potable water, thinking that all methods are the same.

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