Hard and soft water 0.0 / 5 ? ChemistryWater hardness and solubilityGCSEAQA Created by: daisybrownCreated on: 26-03-14 14:22 Hard water contains __ and __ ions? Magnesium and sodium 1 of 15 The ions in hard water react with soap to form __? Scum 2 of 15 Soft water forms a __ easily with soap? Lather 3 of 15 __ hard water remains __ upon boiling? Permanent hard 4 of 15 Temporary hard water contains __ ions? Hydrogencarbonate 5 of 15 Hydrogencarbonate ions __ upon heating to product __ ions? Decompose carbonate 6 of 15 These carbonate ions react with magnesium/calcium ions to form a __? Precipitate 7 of 15 Hard water does not form a __ with soap easily so more soap is required which is __? Lather expensive 8 of 15 Temporary hard water builds up __ inside kettles and heating systems which reduces their __? Scale efficiency 9 of 15 Hard water can lead to __ risk of heart disease? Reduced 10 of 15 Hard water can __ strength of bones and teeth? Increase 11 of 15 Sodium carbonate reacts with the magnesium and calcium ions to form __ which are __? Precipitates insoluble 12 of 15 Commercial water softener a contain an __? Ion-exchange column 13 of 15 The column supplies __ or __ ions? Hydrogen sodium 14 of 15 These ions __ the calcium or magnesium ions in the water? Replace 15 of 15
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