Redox reaction are chemicalreaction in which reactantsexperience a change in oxidationnumber.Oxidation is the gain of oxygen.Reduction is the loss of oxygen
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
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.
Reducing agents can react with Reducing agents.Reducing agents cannot react with Oxidizing agents.Oxidizing agents cannot react with Reducing agents.
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)
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.
Forthe following QNs, what are the reducing agents and oxidizing agents and what has been oxidized or reduced?