Magic Drinks
Magic Drinks
Magic Drinks
Fichedeprsentationdelaressource
Titre:Magicdrinks!Desboissonsredox ExtraitduBOEN CONNAISSANCES Ractionsacide/base Ractionsdeprcipitation Ractionsdoxydorduction CAPACITES Reconnatrelesractions Savoirlesajuster Publicvis:BTSChimie1reanne
Objectifsdisciplinaires: Savoirreconnatrelesespcesmisesenjeudanschacunedesractions. Savoircrirelesdemiquationspuisquationsrdoxouquationsdeprcipitation. Savoiranalyserlesphnomnesobservsdanslexprienceenrapportauxquationscrites. Ajustagedesquationsdoxydorduction(rappeldelyce) Objectifslangagiers: Comprhensionorale ProductionOraleprendrepartuneconversation(interactionorale).(parler) Matrielncessaire:Vidoprojecteuretenceintes Propositiondexploitationdelasquence: AVANTLASEQUENCE Lecoursdoxydorductionetses applicationssonttudisenamont encoursdechimieinorganique. Levocabulaireliloxydorduction estensuiteabordenanglais. AUCOURSDELASEQUENCE Visualisationdunfilmde5minralisparun professeurbritanniquemettantenuvre5 expriencesralisesdans5verresdiffrents. Lefilmestvuaumoins23reprisesavec arrtssurimage,commentairesdelaclasse Lestudiantsdoiventtoutdabordnoterles motscls,puisceuxcisontinscritsautableau. Cecipermetdecernerlesujetdufilm. Plusieurstudiantsdoiventensuitereformuler avecleursmotslatramedufilm. Lestudiantsdisposentensuitedunefiche: ilsdoiventindiquerpourchaqueMagic Drinklenomdesractifs,desproduits,les observationsetaufinallaractionajuste. Ilsdoiventcommuniquerleursrponses loralquandcelaestpossibleouautableau pourlcrituredquations.
1/6
Chimieenanglais
Natureetobjectifsdelvaluation: Evaluationformative:Prsentationoraleduneractionredoxauchoix Evaluationsommative:Equilibragederactionsredoxendonnantlenomdesractifset produits. Niveaurequisetfichierssources Languecible Anglais Niveaurequis Comprhensionorale:B1 Expressionorale:B1 CesniveauxsontdfinisdansleCadreCommunderfrencepourles Langues: http://fr.wikipedia.org/wiki/Cadre_europen_commun_de_rfrence_po ur_les_langues Nombredesances 2sances: 1)Travailpartirdelavido(2hou2*1hensallequipedun vidoprojecteur) 2)prsentationsorales(1h,utilisationduvidoprojecteur) Documentsupport Document1 http://www.rsc.org/Education/Teachers/Resources/Practical Chemistry/Videos/turningwineintwater.asp Fichiertlchargeable,dmonstration:MagicDrinks Source:RoyalSocietyofChemistry,siteducatif
Provenance:CANUCcile,cecile.canu@gmail.com
2/6
Chimieenanglais
Magicdrinks!
1. FINDINGTHEKEYWORDS
Watch the video a couple of times and write downthekeywordsthatyouhear: Startat38 Source :http://www.rsc.org/Education/Teachers/Resour ces/PracticalChemistry/Videos/turningwine intwater.asp
Transformingredwineintowhitewine!
Youmustcomeupwithatleasttenwords 1.__________ 2.__________ 3.__________ 4.__________ 5.__________ 6.__________ 7.__________ 8.__________ 9.__________ 10.__________ Writeyourkeywordsontheboard. Teachersnote:havethestudentsexplainthekeywordstotheclasswithoutgivingatranslation.
Source: http://commons.wikimedia.org/wiki/File:Red_Wine_Glas.jpg http://commons.wikimedia.org/wiki/File:White_Wine_Glas.jpg
2. VOCABULARYHELP
Youmayhavecomeupwiththefollowingkeywords.Theseareessentialfortherestofyouractivity: Teachersnote:havethestudents(whoknowthisvocabulary)explainittotheclasswithoutgivinga translation. anacidifiedsolution, potassiumpermanganate, sodiumthiosulfate, baryumchloride, ajug,acarafe, tomakeupsolutions, raspberry, fizzy, aprecipitate, colourless, tosettleout
3/6
3. REPHRASING
Chimieenanglais
Watch the video again, and use the keywords on the board and in your worksheet to help you understandthevideo. Writeashortsummaryofthevideo,andthenexplainittotheclass. __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________
4. FILLINTHEREAGENTANDCOLORBOXES
UseAPPENDIX1 STEP1: Watchthevideoagain,andfocusonthereagentsforeachglass.Youmaywanttowatchitacouple oftimestogetthenamesright. STEP2: Watchthevideooncemore,andthistimefocusonthefinalcolor. Teachersnote:havethestudentscorrectthereagentsandfinalcolorsbeforeproceedingtothenext step.
5. WORKOUTTHECHEMICALREACTIONS
UseAPPENDIX1 Help:Youaregiventwoconjugateacidbasepairs:HCO3/CO32(2),H2CO3/HCO3(1) YouarealsotoldthatcarbonicacidH2CO3(aq)readilydecomposesasfollowsH2CO3(aq)=CO2(g)+H2O(l) Nowthatyouknowwhichreagentsarepresentandthatyouhaveanideaofthefinalproducts,work outthepossiblereactions. Thesecouldbeeither: redoxreactions acid/basereactions precipitationreactions Teachersnote:havethe studentswritetheirreactionsontheboardandjustifythemtotheclass. ThengiveoutAPPENDIX2.
4/6
Chimieenanglais
APPENDIX1:Magicdrinks!
Reagents : 1
Reagents :
Reagents :
Reagents :
Reagents :
Final color :
Chemicalreaction
Chemicalreaction
Chemicalreactions
1) 2) 3) 4)
Final color :
Final color :
Final color :
5/6
Chimieenanglais
APPENDIX2:Answersheet
Reagents : S2O32-, MnO4-, H3O+ Reagents : S2O322+ Ba , MnO4 , H3O+, SO42Reagents : Ba2+ MnO4-, H3O+, SO42Reagents : S2O32-, CO32- MnO4-, H30+, SO42-
Chemicalreaction
1) 10 S2O32- + 2MnO4- +16 H30+= 5 S4O62- + 2Mn2++24 H2O 2) Ba2+ + SO42- = BaSO4(s)
Chemicalreactions :
Chemicalreaction
Ba2+ + SO42- = BaSO4(s)
1) 10 S2O32- + 2MnO4- +16 H30+= 5 S4O62- + 2Mn2++24 H20 2) CO3 2- + H3O+ =H CO3- + H2O 3) H CO3- + H3O+ =H2CO3 + H2O 4)H2CO3 = CO2(g) + H2O Final color :translucid, fizzy
Chemicalreactions
6/6