Water revision 0.0 / 5 ? ChemistryWater hardness and solubilitywaterGCSEWJEC Created by: lucyjnkinsCreated on: 03-04-22 21:26 distillation in desalination heating up seawater so it evaporates. evaporated water is condensed into a liquid 1 of 19 desalination removal of salt from sea water 2 of 19 reverse osmosis selectively permeable membrane that only allows water molecules past 3 of 19 fluoridation advantages strengthens enamel therefore prevents cavities 4 of 19 fluoridation disadvantages mass medication fluorisis in kids thyroid issues 5 of 19 water treatment sedimentation filtration chlorination 6 of 19 sedimentation insoluble particles sink to the bottom of a large tank 7 of 19 abstracting water removing water from a source e.g. rainwater, reservoirs, underground sources, rivers, lakes etc 8 of 19 distributing water underground pipe systems 9 of 19 reducing water consumption shorter showers, eat less meat, turn off taps 10 of 19 what is in our water? dissolved gases, ions, micro-organisms, pollutants 11 of 19 pollutants pesticides, herbicides, chemical fertilisers 12 of 19 dissolved gases CO2 and oxygen gas byproduct of respiration of micro-organisms 13 of 19 ions too much is bad for health water dissolves ions from small amounts of rocks 14 of 19 micro-organisms habitat for bacteria treated with chlorine to kill 15 of 19 hard water contains dissolved magnesium and calcium ions difficult to form a lather, makes scum instead 16 of 19 soft water low concentration of magnesium and calcium ions commonly contains sodium ions forms a lather with soap 17 of 19 temporary hardness caused by dissolved calcium hydrogen carbonate hardness is removed by boiling water 18 of 19 permanent hardness caused by dissolved calcium sulphate cannot be removed by boiling 19 of 19
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