Chemistry 0.0 / 5 ? ChemistryRate of reactionIGCSEEdexcel Created by: pooCreated on: 26-03-13 12:44 Most metals are found in... Ores 1 of 23 the More reactive a metal is the..... Harder it is to extract 2 of 23 Reduction is... the loss of Electrons/loss of oxygen 3 of 23 why can't all metals can be extracted by a reduction reaction with carbon? some metals are less reactive than carbon 4 of 23 How is a reduction reaction done? Metals ores are heated with carbon monoxide 5 of 23 give 3 metals then can be extracted using carbon... zinc,iron and tin 6 of 23 Do very reactive metal form stable or unstable ores? stable 7 of 23 How do we extract more reactive metals than carbon? electrolysis 8 of 23 electrolysis is using _________ to _________ the metal from other elements in the _________ . Electricity, separate, compound 9 of 23 How and why is Aluminium extracted? by electrolysis because its more reactive than carbon 10 of 23 Aluminium main ores is_______ and is pure aluminium _______, it is a very _________ metal. Bauxite (Al 0) oxide, abundant 11 of 23 what is Al melting point? over 2000 degrees 12 of 23 molten Cryolite is used to..... lowers the temperature making it easier and cheaper 13 of 23 the Electrodes are made of ..... and why Graphite- a good conductor of electricity 14 of 23 is the anode - and + positive 15 of 23 what is special about the cathode for extracting Al? it lines the vessel 16 of 23 why does the Al have to be molten? to allow it to conduct electricity and become free ions 17 of 23 positive Al ions are attracted to the _______ charged _______, where they pick up ______ and turn in Al ______. negatively, cathode, electrons, atoms 18 of 23 where do the Al go after it has been turned into atoms? sink to the bottom 19 of 23 what happens to the oxygen ions? they are attracted to the anode (+) where they lose electrons to become atoms. 20 of 23 what gas(es) are produced at the anode and why does it need to be replaced? O and CO because the atoms reacts with the carbon in the anode which is constantly getting worn down so needs replacing. 21 of 23 Overall it is a _______ reaction because both _______ and ________ take place. Redox, reduction, oxidation 22 of 23 what are the reactions at both electrodes ? cathod: 23 of 23
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