Chemistry 3 0.0 / 5 ? ChemistryElectrolysisGCSEOCR Created by: hannah.monksCreated on: 07-04-16 20:52 2 ways of extracting salt Salt deposits and Solution mining. 1 of 12 Impacts on the environment of salt mining . Subsidence caused by collapsed holes and it requires energy from burning fossil fuels which is causing pollution. 2 of 12 How to show the movement of tectonic plates. Magnetic clues, cooled crust moving and sedimentary rocks being found in different areas. 3 of 12 Uses of salt in food production. Refined salt is added to processed food and used as a preservative. 4 of 12 Health issues with the use of salt. Causes high blood pressure and could increase the chance of getting stomach cancer. 5 of 12 What is electrolysis in brine? Causes chemical change, it splits the solution into: hydrogen, chlorine and sodium hydroxide. 6 of 12 Environmental impacts of large scale electrolysis? Requires a lot of energy which means burning fossil fuels. Mercury is a toxic chemical and asbestos can cause lung cancer. 7 of 12 Why is chlorine important in water treatment? Kills disease-causing microorganisms, kills bacterias and prevents the growth of algae. 8 of 12 What is an alkali? A compound that forms hydroxide ions when dissolved in water. 9 of 12 5 examples of how chemicals are used in industry. Drugs, plastics, metals, paints and fuels. 10 of 12 How do plasticisers harm the environment? It contains carbon, hydrogen and chlorine and when the PCBs used to make PVC leach out of the plastic, it goes into water sources and is toxic. 11 of 12 4 stages of the life cycle assessment (LCA)? Choice of material, manufactoring, using the product, disposal of the product. 12 of 12
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