GCSE Chemistry - Potable Water - Treating Freshwater | Desalinating Seawater (2026/27 exams)

⭐️ Check out our website https://www.cognito.org/ ⭐️ ** WHAT'S COVERED ** 1. Potable Water Explained The definition of potable water as water that is safe to drink. The key differences between pure water and potable water. The three essential criteria for water to be classified as potable, including levels of dissolved substances, pH range, and the absence of microorganisms. 2. Obtaining Potable Water from Fresh Water An overview of fresh water sources like surface water (rivers, lakes) and groundwater (aquifers). The multi-step process for treating fresh water to make it potable. Methods of filtration to remove solid particles. Sterilisation techniques, including the use of chlorine, ozone, and ultraviolet light to kill harmful microbes. 3. Desalination of Sea Water An explanation of desalination as a method to produce potable water, particularly in regions with low rainfall. A description of desalination through distillation. An explanation of desalination using reverse osmosis. The challenges of desalination, including high energy requirements and cost. ** CHAPTERS ** 0:00 Introduction to Potable Water 0:25 Pure Water vs Potable Water 0:46 Criteria for Potable Water 1:16 Sources of Fresh Water 2:27 Treating Fresh Water 2:39 Filtration and Sedimentation 2:56 Sterilisation of Fresh Water 3:14 What is Desalination? 3:40 Desalination by Distillation 4:20 Desalination by Reverse Osmosis ** PLAYLISTS **    • KS3 Biology      • KS3 Chemistry      • KS3 Physics      • GCSE Maths (9-1)      • GCSE Biology (9-1)      • GCSE Chemistry (9-1)      • GCSE Physics (9-1)      • A-Level Biology   #GCSE #Chemistry #study #revision #school #exam #AQA #OCR #Edexcel