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Redox

redox by a'bidah, hamidah, syakiran, zulkamal and elfi.

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Redox

  1. 1. Redox reaction are chemicalreaction in which reactantsexperience a change in oxidationnumber.Oxidation is the gain of oxygen.Reduction is the loss of oxygen
  2. 2. No Definition Oxidation Reduction1 Oxygen Transfer Gain O (+) Lose O (-)2 Hydrogen Transfer Lose H (-) Gain H (+)3 Electron Transfer Lose E (-) Gain E (+)4 Change in Oxidation state Increase (+) Decrease (-) number
  3. 3. Find the oxidation states ofeach element in (NH4)2SO4The ammonium ion NH4+ has an overall charge of +1. The nitrogenatom (-3),Hydrogen atom (+1). The sulfate ion (SO4 2-) has an overall charge of -2. (-2) for oxygenAtom and (+6) for sulfur atom.
  4. 4. In a Nutshell….
  5. 5. Reducing agents can react with Reducing agents.Reducing agents cannot react with Oxidizing agents.Oxidizing agents cannot react with Reducing agents.
  6. 6.  Chemicals added: Acidified Potassium Dichromate(VI) and Bromine/Iodine solution. Observation: Acidified Potassium Dichromate(VI) turns from orange to green. Iodine solution turns from brown to colorless. OR Bromine solution turns from Reddish brown to colorless. (Solution decolourised)
  7. 7.  Chemical added: Potassium iodide solution and Carbon. Observation: Colourless Potassium iodide solution turns Brown. Also, Black C(s) dissolves. CO2(g) evolved forms white precipitate in limewater.
  8. 8. Forthe following QNs, what are the reducing agents and oxidizing agents and what has been oxidized or reduced?
  9. 9. 1)Zn(s)+CuO ZnO(s)+Cu(s)2)Fe2O3(s)+3CO(g) 2Fe(s)+3CO2(g)3)Mg(s)+H2O MgO(s)+H2(g)
  10. 10.  https://www.youtube.com/watch?v=glq ZlISuyJk&feature=youtube_gdata_player

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  • AbdullahShakeel8

    Jul. 22, 2020

redox by a'bidah, hamidah, syakiran, zulkamal and elfi.

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