which of the followoing reactions are oxidation-reduction reactions?
929483
They all are !\n\nGive each element in the reaction an oxidation number, then see which ones change. An increase in oxidation number is a loss of electrons (oxidation), while a decrease in oxidation number is a gain of electrons (reduction).\n\nAn oxidising agent causes another substance to be oxidised;  it takes electrons from the other substance, and is therefore, itself, reduced.\n\nFor the first reaction.\n\nreactants\nNH3 :  N = -3,   H  = +1\nO2 :    O = 0\nproducts\nNO2 :  N = +4,  O = -2\nH2O :  H = +1, O = -2\n\nnitrogen has lost electrons; it has been oxidised; it is a reducing agent\n\noxygen has gained electrons; it has been reduced; it is an oxidising agent\n\nhydrogen has been neither oxidised nor reduced
610699
Pb(NO3)2(aq) + H2SO4(aq/l)[depending on concentration] --> PbSO4(s) + 2HNO3(aq)\nPb2+(aq) + SO42-(aq) --> PbSO4(s)\n\nI don't see how an redox reaction could occur.
697397
NaOH\nSn(NO3)2\nCo2O3\nFeF2\nCuS2\nFe(OH)3\nAgBr
154071
Baeyer-Villiger oxidation \nBarbier reaction \n**Barton-McCombie deoxygenation \nBaylis-Hillman reaction \n**Beckmann rearrangement \nBergman cyclization \nBirch reduction \nBischler-Napieralski isoquinoline synthesis \nChan rearrangement \nChichibabin reaction \nClaisen condensation \nClaisen rearrangement (traditional) \nClaisen rearrangement (Eschenmoser variant or Eschenmoser-claisen) \nClaisen rearrangement (Johnson variant or ortho ester variant) \noxy-Cope rearrangement \nCorey-Winter reaction \nCurtius rearrangement \nDanishefsky's diene \n**Darzens condensation \n**Demjanov rearrangement \nDess Martin periodinane oxidation \n**Dieckmann condensation \n**Diels-Alder reaction \n**Favorskii rearrangement \nFétizon's reagent \ncarbon-Ferrier rearrangement \nFinkelstein reaction \nFisher indole reaction \n**Fleming-Tamao oxidation \nFriedel Crafts acylation \nFriedel Crafts alkylation \n**Fries rearrangement \n**Fritsch-Buttenberg-Wiechell rearrangement \n**Gabriel synthesis \nGarner aldehyde \nGlaser reaction \n**Grignard reaction \n**Grob fragmentation \nHaller-Bauer reaction \nHeck reaction \nHenry reaction \nHofmann elimination \nHofmann rearrangement \nHorner-Wadsworth-Emmons olefination \nJones oxidation \n**Julia epoxidation \nKeck allylation \nKnoevenagel condensation \n**Kulinkovich reaction \n**Luche reduction \nMajetich cyclobutane annulation \n**McMurry coupling \nMichael addition \nMitsunobu reaction \nMosher's acid - determine enantiomeric composition \nNazarov cyclization \nNeber reaction \n**Nysted reagent (olefination of carbonyls) \nParikh-Doering oxidation \nPaterno-Buchi cyclization \nPauson-Khand reaction \nPearlman's catalyst \n**Payne rearrangement \n**Pechmann condensation \n**Peterson olefination \n**Pictet-Spengler Cyclization \n**Ramberg-Bäcklund rearrangement \nRaney nickel \n**Reformatsky reaction \n**Robinson annulation \nRoush coupling \n**Schmidt reaction \nSchwartz reagent \nSeyferth-Gilbert homologation \nShapiro reaction \nSharpless asymmetric dihydroxylation \nsimmons-Smith reaction \nSonogashira coupling \nStevens rearrangement \nStille coupling \nStobbe condensation \n**Suzuki coupling \nSwern oxidation \nTebbe reagent \n**Tiffeneau-Demjanov rearrangement \nTishchenko reaction \n**Ugi condensation \nVilsmeier formylation \nWagner-Meerwein rearrangement \n**Willgerodt-Kindler reaction \nWilkinson's catalyst \nWittig olefination \nWittig rearrangement ([2,3]-sigmatropic rearrangement) \nWolf-Kishner reduction\nZimmerman-Traxler transition state model
1176803
http://en.wikipedia.org/wiki/Oxidizing_agent\nhttp://en.wikipedia.org/wiki/Reducing_agent
525378
oxigen normally takes two electrons from another atom to complete its valence .. but I dont know what you mean\n\nwhen you burn something.. youre reacting it with heat and oxigen.. so thats one way it reacts\ni hope it helped
59632
oxidation \n\nAny chemical reaction in which a material gives up electrons, as when the material combines with oxygen. Burning is an example of rapid oxidation; rusting is an example of slow oxidation. (See combustion and reduction.)
789348
This is a strange question because acid-base reactions are never redox, so there is never any such thing as an acid base reduction. The reaction between acids and bases is called neutralisation.
929785
You must figure out the oxidation number of each element in an equation.  The substance oxidized goes up in oxidation number (becomes more positive) and the substance reduced goes down in oxidation number (becomes more negative).  The substance that is oxidized is the reducing agent (causes reducing in the other element) and the substance that is reduced is the oxidizing agent (causes oxidation in the other element).\nSO . . .\nin (a) carbon on the left side is -4 and on the right side is +4 so it is oxidized and CH4 is the reducing agent\n     oxygen on the left side is zero (all elements are zero) and on the right side is -2 so it is reduced and O2 is the oxidizing agent\nin (b) zinc on the left is zero and is +2 on the right, so it's oxidized and Zn is the reducing agent\n     hydrogen on the left is +1 and is 0 on the right, so it's reduced and HCl is the oxidizing agent\nI'll leave the rest for you!
795833
LHS:\nPb4+\nSn2+\nCl-\n\nRHS:\nPb2+\nSn4+\nCl-\n\nOxidation number of Pb in PbCl4 decreases = it is reduced = it oxidizes the other = it is the oxidizing agent
770209
Oxidation.  \n\nWhen an ion or atom gains an electron, it's reduction.  When both reactions happen, then it's redox.
116069
The balance is :\n\n     H2O2(aq) -> O2(g) + 2H+(ag) + 2e-\n MnO2(s) + 4H+(aq)  +  2e-  ->  Mn2+(aq)  + 2H2O\n \n Combine the two half-reactions and cancel on both sides yield the     complete balance equation.\n\n MnO2(s) + H2O2(aq) + 2H+(aq) -> Mn2+(aq) + O2(g) + 2H2O\n\n this is an oxidation-reduction reaction\ntype  decomposition reaction.
877256
these electrons are the ones that participate in chemical reactions, ie formation of bonds
155506
Exothermic reactions are very common.  Most oxidation reactions are exothermic.  This would include rusting iron as well as burning just about any kind of fuel: gas, oil, wax, gasoline or alcohol.  In all of these reactions something is reacting with oxygen and the reaction gives off heat.\nEndothermic reactions are much less common. Commercially available cold packs usually consist of 2 inner containers, one with urea and the other containing ammonium chloride within a plastic bag.  When the containers are broken (usually by bending) the compounds react and absorb heat from the environment.  This makes the bag get cold.
828740
fe is the reducing agent cos fe undergo oxidation prosess changing its oxidation no from 0 to 2+
713038
the other product is zinc chloride.\nand the reaction is single replacement.
262331
It all depends on what reaction you are asking about. Are you asking a question regarding the conversion of one molecule to another in a biological system or nuclear decay which is a chemical reaction or the oxidation of a piece of coal in a furnace. If you would specify the reaction involved, I might be able to help you.