GCSE Chemistry Revision — Potable Water
Revise Potable Water for GCSE Chemistry with a topic explanation, worked example and common mistakes. Check the board notes for specification differences.
At a glance
- What StudyVector is
- An exam-practice platform with board-aligned questions, explanations, and adaptive next steps.
- This topic
- Potable Water in GCSE Chemistry: explanation, examples, and practice links on this page.
- Who it’s for
- Students revising GCSE Chemistry for UK exams.
- Exam boards
- Check your course page and the topic board notes for supported specifications.
- Free plan
- Sign up free to use tutor paths and feedback on your answers. Free access is Free daily revision · No card required. Pricing
- What makes it different
- Syllabus-shaped practice and progress tracking—not generic AI answers.
This page includes a topic explanation and a worked example. Check your course for current practice coverage.
Next in this topic area
Next step: Waste Water Treatment
Continue in the same course — structured practice and explanations on StudyVector.
Go to Waste Water TreatmentTopic explanation
What is Potable Water?
Potable water is water that is safe to drink. It is not pure water in the chemical sense, as it contains dissolved minerals and salts, but it has been treated to remove harmful microbes and has acceptably low levels of dissolved substances. The methods used to produce potable water depend on the source and quality of the available freshwater.
Board notes: The treatment of water to make it potable is a key topic for all exam boards. You need to know the difference between pure and potable water and be able to describe the main stages of water treatment. Desalination is also covered, especially as a higher-tier topic.
Step-by-step explanationWorked examples
Worked example
In the UK, water from rivers is stored in reservoirs to allow large solids to settle out (sedimentation). It is then passed through filter beds of sand and gravel to remove smaller particles (filtration). Finally, a small amount of chlorine is added to kill any remaining harmful bacteria (chlorination).
Practise this topic
Start with low-focus cards for Potable Water, then move into full exam-style practice when you want the heavier session.
Common mistakes
- 1Confusing potable water with pure water. Potable water is safe to drink but is still a mixture; pure water (H₂O) contains no dissolved substances.
- 2Thinking that all water needs to be treated in the same way. The treatment required depends on the source. River water needs more treatment than groundwater from an aquifer.
- 3Forgetting the main stages of water treatment: sedimentation, filtration, and chlorination.
Potable Water exam questions
Check the available question sets for Potable Water. Use your course and exam board to confirm which practice is relevant.
Potable Water exam questionsGet help with Potable Water
Get a personalised explanation for Potable Water from the StudyVector tutor. Ask follow-up questions and work through problems with step-by-step support.
Open tutorSave your progress in Potable Water
Start a free account for low-focus question cards, feedback and Play routes across available topics. Free daily limits apply; no card required.
Continue your revision
A public question for Potable Water is still being reviewed. Your course page shows the topics currently available for practice.
Continue with Potable Water
Create a free account to keep your course choice and save your practice progress.
Start free low-focus cardsAlready have an account? Log in
Frequently asked questions
What is desalination?
Desalination is the process of removing salt from seawater to make it drinkable. It is used in countries with a shortage of fresh water. The main methods are distillation and reverse osmosis, both of which require a lot of energy.
Why is chlorine added to drinking water?
Chlorine is a disinfectant. It is added to kill pathogenic microorganisms (like bacteria and viruses) that could cause disease.