三草酸合铁酸钾的制备英文版.ppt

Thank You! EXPERIENCE 23Synthesis,Composition Analysis and Characterization of Potassium Trioxalatoferrate(Ⅲ)12426 25/26/27/28/29/30/31/32 Contents Objectives Principles equipment and chemicals Procedures 4 1 2 3 1 5 Instructions Objectives: To learn basic operations such as synthesis, characterization and chemical analysis of coordination compounds. To develop analytical and problem solving skills through the practice of experimental design. Principles: One of the ways to prepare potassium trioxalatoferrate(Ⅲ) : The product crystallizes after the addition of oxalate Beaker Equipment and Chemicals Equipment Chemicals (NH4)2Fe(SO4)2.6H2O K2CrO4 6% H2O2 95%C2H5OH 1mol/LH2SO4 H2C2O4 aq Buchner funnel Graduated cylinder Platform balance Thermostatic water bath Suction flask Evaporating dish Procedures Dissolved in the 50ml beaker 2.5g(NH4) 2SO4 · FeSO4 · 6H2O 3 drops 1mol/lH2SO4 water 10ml heating and dissolution-precipitation mix with saturated H2C2O4 12.5ml yellow precipitation boiling water-bath heating Saturated K2C2O4 increase 5ml solution in water-bath heating to 40 ° C dropping 6%H2O2 5ml keep stirring the solution maintain a temperature of 40 ° c Heat AND keep precipitation near-boiling saturated H2C2O4 4ml cooled to room temperature 95% 10ml a few tablets of potassium nitrate with ethanol dish cover the beaker on the surface, the dark 1-2 crystallization, vacuum filters and a small amount of ethanol 95% washing Filter by suction Instructions Under 40 ℃ water bath heating, slowly dripping with H2O2. In order to prevent the decomposition of H2O2 . Iron hydroxide precipitation to fully, heat to boil to make colloidal precipitate into easy to filter, washing the precipitation. Decompression filter to specification.Especially pay attention to in the process of suction filter, dont flush adhesion in a beaker and buchner funnel on a small amount of green products, otherwise, will greatly affect production. Preparation of three root a