Identification of an Unknown Compound to Determine Proper Waste Procedures
Department of Chemistry, Michigan State University, East Lansing, MI 48823
October 13, 2015
For completion of CEM 161 Section 009, under supervision of
Abstract: In order to determine the identity of the compound we performed many experiments with a solution of the compound. These experiments included testing for all of the following ions; ammonium, halide, sulfate, carbonate, nitrate, and acetate. After comparing the results of these experiments we determined that our compound contained a halide. By using the flame test with a Bunsen Burner we also determined that our compound had a red colored flame leading us to our conclusion that the unknown …show more content…
By determining the solubility we can limit the unknown compound into either soluble or poorly soluble, by using the reference material given in LabArchives under the Dealing with Unknown Compounds tab. In order to come up with what compounds are soluble or unsoluble we would have needed to test all the compounds given to us in the reference material (Figure 1.2) but we could just compare the results. General Solubility Guidelines of Ionic Compounds in Water
SOLUBLE COMPOUNDS EXCEPTIONS
Almost all sodium (Na+ ), potassium (K+), and ammonium (NH4+ ) salts
All chlorides (Cl- ), bromides (Br- ), iodides (I-) Ag+ , Hg2+ , Pb2+
All fluorides (F- ) Mg2+ , Ca2+ , Sr2+ , Ba2+ ,Pb2+
All nitrates (NO3- ), chlorates (ClO3- ), perchlorates (ClO4-), and acetates (CH3COO- ) Acetates of Ag+ and Hg2+ are only moderately soluble
All sulfates (SO42- ) Sr2+ , Ba2+ , Pb2+ (Ca2+ and Ag+ moderately soluble) POORLY SOLUBLE SALTS EXCEPTIONS
All carbonates (CO32- ), phosphates (PO43- ), oxalates (C2O42- ), and chromates (CrO42- ) Na+ , K+ , NH4+
All sulfides (S2- ) Alkali and alkaline earth metal ions and NH4+
All hydroxides (OH- ) and oxides Alkali metals (those of Ca2+, Sr2+, and Ba2+ only moderately
Department of Chemistry, Michigan State University, East Lansing, MI 48823
October 13, 2015
For completion of CEM 161 Section 009, under supervision of
Abstract: In order to determine the identity of the compound we performed many experiments with a solution of the compound. These experiments included testing for all of the following ions; ammonium, halide, sulfate, carbonate, nitrate, and acetate. After comparing the results of these experiments we determined that our compound contained a halide. By using the flame test with a Bunsen Burner we also determined that our compound had a red colored flame leading us to our conclusion that the unknown …show more content…
By determining the solubility we can limit the unknown compound into either soluble or poorly soluble, by using the reference material given in LabArchives under the Dealing with Unknown Compounds tab. In order to come up with what compounds are soluble or unsoluble we would have needed to test all the compounds given to us in the reference material (Figure 1.2) but we could just compare the results. General Solubility Guidelines of Ionic Compounds in Water
SOLUBLE COMPOUNDS EXCEPTIONS
Almost all sodium (Na+ ), potassium (K+), and ammonium (NH4+ ) salts
All chlorides (Cl- ), bromides (Br- ), iodides (I-) Ag+ , Hg2+ , Pb2+
All fluorides (F- ) Mg2+ , Ca2+ , Sr2+ , Ba2+ ,Pb2+
All nitrates (NO3- ), chlorates (ClO3- ), perchlorates (ClO4-), and acetates (CH3COO- ) Acetates of Ag+ and Hg2+ are only moderately soluble
All sulfates (SO42- ) Sr2+ , Ba2+ , Pb2+ (Ca2+ and Ag+ moderately soluble) POORLY SOLUBLE SALTS EXCEPTIONS
All carbonates (CO32- ), phosphates (PO43- ), oxalates (C2O42- ), and chromates (CrO42- ) Na+ , K+ , NH4+
All sulfides (S2- ) Alkali and alkaline earth metal ions and NH4+
All hydroxides (OH- ) and oxides Alkali metals (those of Ca2+, Sr2+, and Ba2+ only moderately