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COURSE NAMEINTRODUCTION TO INORGANIC CHEMISTRYCOURSE CODESKT1013EXPERIMENT 4PREPARATION OF POTASSIUM TRIS(OXALATO)ALUMINATE(III)TRIHYDRATESEMESTER / SESSIONSEM 2 2016/2017GROUP FNAMEMATRIC NO.MOHAMAD AFIQ AIMAN BIN AZHARE20151011262MUHAMMAD IZZUDDIN BIN HAZANE20151011301LECTURERPROFESOR MADYA DR. NORHAYATI BINTI HASHIM
Experiment 4Preparation of Potassium Tris(Oxalato)Aluminate(III) TrihydrateObjective1.Synthesis potassium tris(oxalato)aluminate(III) trihydrateReagentsPotassium Hydroxide (KOH)Oxalic Acid Dehydrate (H2C2O4∙2H2O)EthanolAcetoneDistilled waterApparatusBeaker (250 ml)Graduated cylinderHot plateGlass rodBuchner funnelFilter paperWatch glassAluminium foilIntroductionAluminium, like many of the transition metals, forms octahedral complex ions. In this lab youwill synthesise potassium tris(oxalo) aluminate(III), K3[Al(C2O4)3]∙3H2O. Is it really thiscompound that is produced, which has three moles of oxalate ion for every mole ofaluminium? Or is it simple aluminium oxalate, Al2(C2O4)3, which has three moles of oxalatefor every two moles of aluminium?First, let’s some background on aluminium. Like several other metals, aluminium isreactive enough to displace hydrogen from water. However, this does not occur becausealuminium developes a layer of aluminium oxide that protects the metal surface. This oxide