Qualitative Lab Report
Tessa Landauer
Chemistry 0340
Qualitative Analysis
Shaopeng Zhang
January 26, 2015
I submit this laboratory report as an original document. I assert that all ideas and discussion of data contained herein is my own work unless otherwise referenced.
Tessa Landauer
Abstract The goal of the experiment was to isolate and purify the unknown D liquid and solid by using its acidic and basic characteristics in a chemically active extraction then to identify the unknowns by analyzing the physical properties on IR and NMR spectrums. The neutral solid was purified through recrystallization and the melting point range was determined to be 47.5oC to 48.9oC. The basic liquid was purified with simple distillation and the boiling point of 135oC was concluded. Through the analysis of IR spectrum of each unknown the structures for each unknowns were devised. An important peak for the solid unknown D was 1655.71 cm-1 (Ketone) and the peaks that were important for liquid unknown D were 1641.69 cm-1 (Amide), 1126.43 cm-1 (C-N bond), and 1384.20 cm-1 (C-N bond). Using the functional groups and the melting and boiling point of each unknown a list of possible identities was generated. The identity of unknown liquid D was 2,6 dimethyl pyridine, and the identity of unknown solid D was benzophenone.
Introduction Chemically active extraction can be used to separate compounds of similar polarities by changing the polarity of one of the compounds in a mixture in order to extract and identify them. The polarities of molecules play an important role and are related to the solubility. Addition of an acid to a mixture will pronate the base to a salt and alternately if a base is added the acid will deprotonate to give a salt product. When extraction is performed in a separatory funnel two noticeable layers form and the polar charged aqueous layer can be drained to leave the nonpolar neutral organic layer in a separatory funnel. Salts formed with the addition of acid or case are soluble in
Chemistry 0340
Qualitative Analysis
Shaopeng Zhang
January 26, 2015
I submit this laboratory report as an original document. I assert that all ideas and discussion of data contained herein is my own work unless otherwise referenced.
Tessa Landauer
Abstract The goal of the experiment was to isolate and purify the unknown D liquid and solid by using its acidic and basic characteristics in a chemically active extraction then to identify the unknowns by analyzing the physical properties on IR and NMR spectrums. The neutral solid was purified through recrystallization and the melting point range was determined to be 47.5oC to 48.9oC. The basic liquid was purified with simple distillation and the boiling point of 135oC was concluded. Through the analysis of IR spectrum of each unknown the structures for each unknowns were devised. An important peak for the solid unknown D was 1655.71 cm-1 (Ketone) and the peaks that were important for liquid unknown D were 1641.69 cm-1 (Amide), 1126.43 cm-1 (C-N bond), and 1384.20 cm-1 (C-N bond). Using the functional groups and the melting and boiling point of each unknown a list of possible identities was generated. The identity of unknown liquid D was 2,6 dimethyl pyridine, and the identity of unknown solid D was benzophenone.
Introduction Chemically active extraction can be used to separate compounds of similar polarities by changing the polarity of one of the compounds in a mixture in order to extract and identify them. The polarities of molecules play an important role and are related to the solubility. Addition of an acid to a mixture will pronate the base to a salt and alternately if a base is added the acid will deprotonate to give a salt product. When extraction is performed in a separatory funnel two noticeable layers form and the polar charged aqueous layer can be drained to leave the nonpolar neutral organic layer in a separatory funnel. Salts formed with the addition of acid or case are soluble in