Experiment 4 - COURSE NAME INTRODUCTION TO INORGANIC...

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COURSE NAME INTRODUCTION TO INORGANIC CHEMISTRY COURSE CODE SKT1013 EXPERIMENT 4 PREPARATION OF POTASSIUM TRIS(OXALATO)ALUMINATE(III) TRIHYDRATE SEMESTER / SESSION SEM 2 2016/2017 GROUP F NAME MATRIC NO. MOHAMAD AFIQ AIMAN BIN AZHAR E20151011262 MUHAMMAD IZZUDDIN BIN HAZAN E20151011301 LECTURER PROFESOR MADYA DR. NORHAYATI BINTI HASHIM
Experiment 4 Preparation of Potassium Tris(Oxalato)Aluminate(III) Trihydrate Objective 1. Synthesis potassium tris(oxalato)aluminate(III) trihydrate Reagents Potassium Hydroxide (KOH) Oxalic Acid Dehydrate (H 2 C 2 O 4 2H 2 O) Ethanol Acetone Distilled water Apparatus Beaker (250 ml) Graduated cylinder Hot plate Glass rod Buchner funnel Filter paper Watch glass Aluminium foil Introduction Aluminium, like many of the transition metals, forms octahedral complex ions. In this lab you will synthesise potassium tris(oxalo) aluminate(III), K 3 [Al(C 2 O 4 ) 3 ] 3H 2 O. Is it really this compound that is produced, which has three moles of oxalate ion for every mole of aluminium? Or is it simple aluminium oxalate, Al 2 (C 2 O 4 ) 3 , which has three moles of oxalate for every two moles of aluminium? First, let’s some background on aluminium. Like several other metals, aluminium is reactive enough to displace hydrogen from water. However, this does not occur because aluminium developes a layer of aluminium oxide that protects the metal surface. This oxide

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