Further additional Science Chemistry 3 0.0 / 5 ? Chemistrythe whole of C3GCSEAQA Created by: ShantelleEllyseCreated on: 22-02-17 20:17 Why is water from a reservoir filtered? To remove solids 1 of 17 Why is water from a reservoir treated with chlorine? To sterilise or disinfect it 2 of 17 Why do water filters contain ion exchange resin? To remove calcium and magnesium ions 3 of 17 Why do water filters contain particles of carbon? Improve taste 4 of 17 What evidence did Mendeleev use to decide that the alkali metals should be in the same group? Similar properties 5 of 17 How are elements in the periodic table arranged in terms of protons? In order of proton number 6 of 17 How are elements in the periodic table arranged in terms of electrons? Elements in the same group have the same number of electrons in the outer shell 7 of 17 State two properties of transition elements that make them more useful than alkali metals for making water pipes Stronger and Less reactive 8 of 17 Give the name of a carbonate in scale Calcium carbonate 9 of 17 What gas is produced when acids react with scale? Carbon dioxide 10 of 17 Why does hydrochloric acid react faster than ethanoic acid? It is a stronger acid which ionises more 11 of 17 Why should hydrochloric acid not be used to dissolve scale in kettles? It is corrosive 12 of 17 Why is a temperature lower than 450 degrees not used for the Haber process? Rate of reaction is too slow 13 of 17 How is Ammonia separated from unreacted nitrogen and hydrogen in the Haber process? Gases cooled and Ammonia liquified 14 of 17 What type of energy is released by hydrogen fuel cells? Electrical 15 of 17 Why might the building of hydrogen filling stations be encouraged? Using hydrogen saves petrol and doesn't cause pollution 16 of 17 Describe a test to show that sodium carbonate contains carbonate ions. Add acid produces carbon dioxide 17 of 17
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