AQA Chemistry Unit 3 Module 2 Hard water 4.5 / 5 based on 4 ratings ? ChemistryWater hardness and solubilityGCSEAQA Created by: Jessica CzinkCreated on: 25-04-13 21:09 Water that lathers easily is called.... Soft water 1 of 14 What dissolved ions make water hard? Calcium and magnesium 2 of 14 What water produces an insoluble solid called scale? Temporary hard water 3 of 14 Magnesium compounds reduce heart disease and help to develop strong bones and teeth. True or False False it is just calcium ions 4 of 14 What can react with calcium and magnesium ions to remove hardness? Carbonate ions 5 of 14 When do hydrocarbonate ions decompose in water? On heating in temporary hard water 6 of 14 Boiling can soften..... Temporary hard water 7 of 14 Adding washing soda removes hardness from what? All hard water 8 of 14 To precipitate out the ions that cause hardness you need to add what? Sodium carbonate 9 of 14 What is an ion exchange column packed with? Resin containing sodium and hydrogen ions 10 of 14 How is water treated to remove solids? Sedimentation and filtration 11 of 14 What is used to kill microbes in drinking water? Chlorine 12 of 14 What is used to kill bacteria in a water filter? Silver 13 of 14 What is flourosis? When your bones get brittle 14 of 14
Comments
No comments have yet been made