TITLE:PREPARATION OF POTASSIUM TRI(OXALATE)ALUMINATE(III)TRIHYDRATEOBJECTIVE:Synthesis potassium tri(oxalate)aluminate(III) trihydrateINTRODUCTION:Aluminium, like many of the transition metals, forms octahedral complex ions. In this lab you will synthesize potassium tris(oxalato)aluminate(III), K3[Al(C2O4)3]•3H2O. Aluminium is reactive enough to displace hydrogen from water. However, this does not occur because aluminium develops a layer of aluminium oxide that protects the metal surface. This oxide coating can be dissolved by acid, according to the equation shown below.