GCSE Chemistry OCR Gateway 3.5 / 5 based on 5 ratings ? ChemistryWater hardness and solubilityGCSEAll boards Created by: GeorgieCreated on: 07-04-12 11:25 What is the first stage of water treatment? Filtration 1 of 4 In sedimentation, 2 substances can be added to the water; which is wrong? Silver Sulphate 2 of 4 What colour is the precipitate when Chloride ions are added to silver nitrate solutions? White 3 of 4 Why is distillation not used in many countries? It uses lots of energy and is expensive 4 of 4
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