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Demonstration:IndigocarmineisaddedtoamixtureNewformulationsforthechemicaltrafficlightandvanishingvalentineexperimentsarepresentedinthispaper Thesecoloursarethoseoftrafficlights.FindthefullequipmentlistandprocedurefortheTrafficlightdemonstrationintheColourchemistryactivities.Thechanges reverseonstandingResazurinNCSU–DeptReversibleoxidation-reductionreactionsBlueBottleBlueBottleandTrafficLightOscillationsAtHepatoChem, we’reseriousaboutourchemistrybutwedon’ttakeourselvestooseriouslyIndigocarmineisaddedtoamixtureofethanolandwaterobservethatthebluedye transformsintochemicaltrafficlightofgreen(oxidizedcolor),red(intermediate)andyellow(reducedcolor)duringtheshaking/standingcycleICisabothapH andaredoxindicator;theoxidizedformisbluebelowpH,yellowabovepHDuetothisreactions,liquidwillturngreen,thenredandthenyellowWhenfurther TrafficLightdrnOmoleculesbyaddingthenumberChemicalequations,usingformulaeandstatesymbols,canbewrittenandbalancedBothdemonstrationsare examplesofredoxreactionsandareusefulforstudiesofchemicalkineticsbecausetemperatureaffectsthecolorchangerateHazards:KOHisastrongbaseand itssolutionsarehighlycorrosive,causingimmediatechemicalburnsoncontact.IRRITANT–seeCLEAPSSChemicalConceptDemonstrated.ChemicalConcept Demonstrated:Reversibleoxidation-reductionreactionsAftershaking,thecolorturnsgreenandthenchangestoredafteritisleftuntouchedKOHisdissolvedin water,dextrose(glucose)isaddedtothissolution,alongwiththeindicatorsolutionForadvanceduser,supplementaryinformationincludingredoxequations, differential/integratedratelaw,ArrheniusequationsandreferencesareprovidedTheTrafficLightDemonstrationThechemicaltrafficlightisastunningcolorfulre‐action!Principle:Thisdemonstrationinvolvesareversibleoxidation-reductionreactionbetweenIC,oxygen(O2),andareducingsugarChemicalConcept Demonstrated:Reversibleoxidation-reductionreactionsResazurinIRRITANT–seeCLEAPSSHazcardHCAtfirst,allchemicalsareaddedtogetherandthe colorappearsyellow.ofChemistry–LectureDemonstrationsKinetics.Theexperimentinvolveschangingcolorswithanindicator–indigocarmineinanalkaline solutionofglucoseThemixturewillturnfromyellowtored-brownwithgentleshakingandtopalegreenwithmorevigorousshakingDemonstration:Indigo carmineisaddedtoamixtureofethanolandwaterWritedowncorrectchemicalTheChemicalTrafficLightExperimentPDFMaterialsChemicalCompounds Wealsoreport,forthefirsttime,chemicalpatternformationinFindthefullequipmentlistandprocedurefortheTrafficlightdemonstrationintheColourchemistry activitiesTheChemicaltrafficlightexperimentFreedownloadasPowerpointPresentationpptClassicTrafficLightChemistryExperiment–PhotochemistryStyle WewantedtoMissing:pdfBasically,thechemicaltrafficlightisavariationofthebluebottlechemistrydemonstration,exceptusingindigocarmineinsteadof methyleneblueDemonstrationDescription:Methyleneblue(BlueBottle)andindigocarmineTheTrafficLightDemonstration