Redox 0.0 / 5 ? ChemistryRedoxIGCSECIE Created by: fatemah.tCreated on: 31-01-18 08:54 Redox when in a chemical reaction oxidation and reduction take place simultaneously than such reaction is called a redox reaction 1 of 17 when does oxidation take place? 1) gain of oxygen 2) loss of hydrogen 3) loss of electron 2 of 17 when does reduction take place? 1) loss of oxygen 2) gain of hydrogen 3) loss of electron 3 of 17 oxidation increase in oxidation state or positive charge 4 of 17 reduction decrease in oxidation state or positive charge 5 of 17 oxidising agent a substance that oxides others and reduces itslef 6 of 17 examples of oxidising agents? 1) some reducing non metals: CL2, O2 2) acidified KMnO4 (potassium manganate) 3)acidified K2CR2O7 (potassium dichromate) 7 of 17 reducing agent a substance that reduces others and oxidises itself 8 of 17 examples of reducing agents? 1) reactive metals: Na, Ca, K 2) KI (potassium iodide) 3) some non-metals: CO,C, H2 9 of 17 how to test for reducing agent? 1) add KMno4: its color changes from purple to colorless 2) add K2CR2O7: its color changes from orange to green 10 of 17 how to test for oxidising agent? 1) add KI: its color changes from colorless to brown 11 of 17 tests these color changes indicate that the agents are present 12 of 17 Non-Redox reactions 1) percipitation reaction 13 of 17 Non-Redox reactions 2) neutralisation reaction 14 of 17 Non-Redox reactions 3) thermal decomposition of metal carbonate 15 of 17 Non-Redox reactions 4) decomposition of metal carbonate by H+ (acid + metal carbonate reaction) 16 of 17 Non-Redox reactions 5) decomposition of ammonium by base/ alkali ( ammonia + base alkali reaction) 17 of 17
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