PRELAB CHEM 3719L CRYSTALLIZATION EXPERIMENT PRELAB ...

1 PRELAB CHEM 3719L CRYSTALLIZATION EXPERIMENT . PRELAB WRITEUP. NOTES. WHEN HEATING SOLUTIONS, SOLVENTS, USE HOT WATER BATH INSTEAD OF HOT PLATE. (FIRE HAZARD). ABSOLUTE EtOH 95% Ethanol PART A Macroscale CRYSTALLIZATION . DATA TABLE. In your LAB BOOK, complete the data table. Compound FW (g/mol) mp (oC) bp (oC) d (g/mL) Misc. Sulfanilamide 95% Ethanol PART A. OUTLINE. Dissolving, Crystallizing, Filtration. 1. Weigh Sulfanilamide, put in 25 mL Erlenmeyer. 2. Put 15 mL 95% EtOH in 2nd Erlenmeyer, add boiling chip. 3. Heat EtOH in HOT WATER BATH (NOT HOT PLATE), until boiling 4. Etc. fill in the rest. PART B.

2 DATA TABLE. SOLVENT SELECTION. In your LAB BOOK, complete the data table. Compound FW (g/mol) mp (oC) bp (oC) d (g/mL) Misc. Fluorene Water Methanol Toluene PART B. OUTLINE. SOLVENT SELECTION. As before, have a brief outline of the EXPERIMENT in your notebook before you begin. PART C. DATA TABLE. MIXED MELTING POINT. The unknowns used in PART C. will come from the list below. The data is provided for you. Compound FW (g/mol) mp (oC) bp (oC) d (g/mL) Misc. 9-Anthraldehyde 104-105 NA NA. Benzil 94-95 NA NA Irritant Benzophenone 48-49 NA NA Irritant 9-Fluorenone 82-85 NA NA. 4-Nitrotoluene 52-54 NA NA Toxic, Irritant PART C.

3 OUTLINE. MIXED MELTING POINT. As before, have a brief outline of the EXPERIMENT in your notebook before you begin.