Synthesis and Charecterization of Cobalt III Coordination Compounds Pre Lab Part 2 Table of Reagents Reagent Molar Density Melting Boiling Hazards Mass g mol g mL Point C Point C NH3 17 03 73 77 73 33 34 H2O 18 02 1 00 0 100 Co NH3 5Cl Cl2 250 45 N A N A N A 2M HCl 36 46 1 49 62 25 108 58 6M HCl 36 46 1 49 62 25 108 58 12M HCl 36 46 1 49 62 25 108 58 Isopropyl alcohol 60 1 786 88 5 82 5 Co2O3 165 86 5 18 1900 N A Ethanol 46 07 789 114 78 37 NaNO2 69 2 71 271 320 Harmful if swallowed Irritates skin eyes and respiratory tract Harmful in copious amounts Harmful if swallowed Skin and eye irritant Harmful if swallowed Irritates skin eyes and respiratory tract Harmful if swallowed Irritates skin eyes and respiratory tract Very harmful if swallowed Extreme irritant to skin eyes and respiratory tract Harmful if swallowed Irritable to skin and eyes Harmful if swallowed Irritable to skin and eyes Harmful if swallowed Irritable to skin and eyes Harmful if swallowed Irritable to skin and eyes Procedure The procedure for this lab was taken from An Introduction to Chemical Systems in the Laboratory 1 I received unknown M and have to synthesize compound D first Compound D 1 Dissolve 2g of Co NH3 5Cl Cl2 which is Compound J in a solution of 3 mL concentrated NH3 and 35mL of water in a 250 mL Erlenmeyer flask Heat the solution and stir until dissolved 2 Filter any cobalt oxide that forms cool the filtrate in an ice water bath for 15 minutes Slowly add 2 M HCl while still in the ice until pH paper shows the solution is neutral This should be around 4 mL 3 Dissolve 2g of sodium nitrate in this solution and add 2 mL of 6 M HCl then swirl for 5 minutes then place in a dry ice bath for 10 minutes be sure the solution does not freeze 4 Isolate the product in a pre weighed glass crucible by suction then wash with 25mL of ice water Then dry with 25mL of ethanol Label the weighing bottle then store the product below 0 C Compound M 1 Synthesize compound D 2 Dissolve compound D in a 20mL flask of hot water with three drops of aqueous ammonia 3 Place the flask in an ice bath and add slowly 20 mL of 12 M HCl Keep it in the ice bath until it reaches 0 C then place in a dry ice bath for 5 7 minutes 4 Filter off product M into a glass crucible by suction 5 Dry with 15mL of ethanol and continue to suction for 30 minutes References 1 University of Illinois at Urbana Champaign An introduction to Chemical Systems in the Laboratory Chem 203 205 2013 2014 ed HaydenMcNeil Plymouth MI 2013
View Full Document
Unlocking...