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1、高中化學(xué)58個精講_(1)_氧化還原反應(yīng)_配平（Highschoolchemistry58Jingjiang_(1)_redoxreaction_trim）Highschoolchemistry58testsites1.Oxidationreductionreactionanditsbalance1.,reviewthekeypoints:1,theconceptofredoxreaction.2.Applicationofelectronconservationprinciple.3,accordingtothevalencenumberc
2、onservationchemicalreactionequation.2.difficultiesfocusConceptsandregularitiesinredoxreactions:One,fivepairsofconceptsInredoxreactions,therearefiveopposingandrelatedconcepts.Theirnamesandrelationshipsare:Two,fiverules1,thenatureofthelawofperformanceThesameelementhasavariety
3、ofvalence,generallyatthehighestvalenceonlywithoxidation,thelowestvalenceonlywithreduction,inthemiddlecannotonlyhastheoxidationresistanceandconstantreducibility.2,thenatureofthelawofstrength3,thelawofreactionTheconcentrationofsimilar,andcontainsseveralofthereductant,addingth
4、eoxidant,itisthefirstandstrongestreductantsolution;similarly,thedifferenceintheconcentrationofthesolution,alsocontainsseveraloxidants,addingreducingagent,itisthefirstandstrongestoxidationsolutionagent.Forexample,byenteringCl2intoasolutioncontainingFeBr2,theFe2+isfirstoxidiz
5、ed4,theregularityofvalenceWhentheredoxreactionoccursbetweenthesubstanceswithdifferentvalencestates,thechangeofthevalencestateoftheelementmustfollowthelawof"highprice+lowpricetointermediateprice".5.ElectronconservationlawInanyredoxreaction,thetotalnumberofelectronsobtainedby
6、anoxidant(orelectronpair)isequaltothetotalnumberofelectronslost(orsharedelectronpairdeviations)ofthereductant.Three.Comparisonofthestrengthorreducibilityofsubstances:(1)comparisonofmetalsornonmetalsofelementsTheoxidationof<1>cationsdecreaseswiththeincreaseoftheirreducibilit
7、yThereducibilityofthenonmetalaniondecreaseswiththeincreaseoftheoxidationresistanceoftheelemental(2)comparisonofreactionconditionsWhenthedifferentoxidantreactswiththesamereducingagent,theeasierthereactionconditionis,thestrongertheoxidationoftheoxidantis.Suchas:Theformeriseas
8、iertoreactthanthelatter,whichcanbeusedtojudgeoxidation:.Similarly,whenthedifferent
