FACULTY OF EDUCATIONBACHELOR OF EDUCATION (HONS.) SCIENCE EDUCATION (MATHEMATICS)(ED249)CHM475:INORGANIC CHEMISTRYASSIGNMENT:LABORATORY REPORT (EXPERIMENT 3)CLASS:ED2494CPREPARED BY:NURUL AINA SALWANI BINTI AHIRRUDIN (2019563945)NURUL HIDAYATI AMIRAH BINTI CHE AZMI (2019358995)PREPARED FOR:DR. MOHD SUFRI MASTULI
LAB REPORT EXPERIMENT 3SYNTHESIS OF POTASSIUM TRIS(OXALATE)CHROMIUM(III) TRIHYDRATE,K3[Cr(C2O4)3].3H2O.PURPOSEThe purpose of this experiment is to synthesize potassium tris(oxalate)chromium(III)trihydrate, K3[Cr(C2O4)3].3H2O.INTRODUCTIONPreparation of new compounds is one of the most important aspects of any chemicalresearch. This process if called synthesis. You will synthesis a special kind of compoundcalled a coordination compound in this experiment. A coordination compound is a compoundcontaining coordinate bonds, typically between a central atom and a number of other atomsor groups. Usually, transition metals readily form these coordination compounds resulting inbright colours.The most stable oxidation state of chromium is Chromium(III). It forms a number ofcomplexes in which six monodentate ligands surround the cation octahedrally. In the abovecompound, two oxalate anions (bidentate ligands) and two water molecules coordinate thechromium cation to provide oxygen atoms at the corners of the octahedron. Two geometricalisomers exist for the complex ion, [Cr(C2O4)2(H2O)2], two (C2O4) 2- ions [or two H2Omolecules] can be on the same side of octahedron structure of the complex ion giving thecis-isomer or on the opposite sides giving trans-isomer.