Question

Prompt: Discuss an example of a redox reaction that you have experienced in real life. Describe (chemically) what the two half-reactions are for the example. Is the reaction spontaneous or nonspontaneous? If you could, would you want to make the reaction more or less spontaneous/nonspontaneous? How might you do so?

Answer 1

Rusting of hon is very typical example of a redox reaction that we have experienced in real life Carbon dioude Cod and water vapour Cleo) present in ahmosphere reacts to :produce Carbowc and (H₂W 3-) which eventually produces proton (tt) which can Catalyses cathode (reduction) reactione My O + W, = H2603 = 2H+ + Cozza 1 I Now at anoldo Coxidation), at tuke filace anode Feest onidation g lon Fe2+ + 200 To CSScarlhed with CamScanner

lat cathode reduction) Lait Catherde reduction e onggent tuke fleuce in foresence of proton water (120) Oz (g) + 2H 0 + 40 4Oh wes Loverall wall cell reathione 2 Pew > 2 F e 2 + + 400 Candel Oq tos + 2H2O2 + 4 60 4 ou laps (cattale Net cell oreaction. - 2Fegy + ©zt97 + 2H2013; } 2 Fe(OH)2tst. CSScalhned with CamScanner

after formation of Fe Co H) there is easy formation of sust, 4 Fe(OH)443 + 0x2g + x H, 0 -3.252.03+(+1) .0 .: Just - Y es reaction is spontaneous and - I would want to make the reachôn Tess spontaneous i CSScained with CamScanner

there are several ways to make this reaction ress shoutine aus or nou spowtaneous y coating and painting Couting the surface of you or applying paint on the suxfuce of Ison, prevent O to react with electron produced e which further stop cell reaction and hence suisting Catheidlic. Pootection this is done by making Iron a . . Cathode by attacking a anode to it anode should have more negative reduction potential than Ison itselt, - - 3 Galvanization. - this is done by applying a protective foyer. I of zinc on the Ison surface foo by Lelectroplating, which further prevent oxygen from real CSscanned with CamScanner