Redox ReactionsOpt

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Redox Reactions. Oxidation Reduction 100’s of free ppt’s from www.pptpoint.com library
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GCSE Oxidation : Gain of oxygen Loss of electrons Reduction : Loss of oxygen Gain of electrons Increase in oxidation number Decrease in oxidation number
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4 Experiments: 1. Burning magnesium 2. Copper in silver nitrate solution 3. Chlorine solution and potassium iodide solution 4. Exploding hydrogen Word equation Balanced symbol equation
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2Mg(s) + O 2 (g) 2MgO(s) Oxidised – gains oxygen Must be a redox! Mg Mg 2+ O O 2- Put the e - in. +2e - +2e - Oxidised – loss of e - Reduced – gain of e -
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Cu(s) + 2AgNO 3 (aq) Cu(NO 3 ) 2 (aq) + 2Ag(s) Ag + Ag Cu Cu 2+ Complete the half-equations +e - +2e - Oxidised? Reduced? Oxidised – loss of e - Reduced – gain of e -
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Try Question 1.
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H 2 (g) + ½ O 2 (g) H 2 O(g) Covalent! No H + or OH - Need a new definition.
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GCSE Oxidation : Gain of oxygen Loss of electrons Reduction : Loss of oxygen Gain of electrons Increase in oxidation number Decrease in oxidation number
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The oxidation number of an atom in an element is zero. E.g. Mg in Mg, O in O
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Redox ReactionsOpt - 100s of free ppts from...

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