C3 - Water hardness and solutes 0.0 / 5 ? ChemistryWater hardness and solubilityGCSEEdexcel Created by: kat-yCreated on: 06-11-16 11:50 Minerals that contain......and....... make water hard Calcium and Magnesium 1 of 11 True or false? It is easier to make lather with soap in hard water. False 2 of 11 Why was the previous statement false? Because the calcium ions and the magnesium ions in the water combine to make an insoluble precipitate. 3 of 11 The insoluble precipitates form....... Scum 4 of 11 The harder the water, the more......is needed to make..... Soap, soap bubbles 5 of 11 This means that..... Some soap is wasted in area with hard water and the scum has to be removed in water treatment works 6 of 11 What might some hard water produce when heated? Limescale 7 of 11 When the process of heating softens the hard water, the water had...... Temporary hardness 8 of 11 Why is the temporary hard water able to be softened when heated? The dissolved calcium and magnesium compounds decompose when heated. 9 of 11 What is removing the hardness of water called? " softening hard water " 10 of 11 How can permanent hard water be removed by the..... Ion exchange column, which will also work on temporary hard water. 11 of 11
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