CHEM 2313 Lecture Notes - Ligroin, Cyclohexane, Dichloromethane
17 Feb 2014
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The objective of this experiment is to distinguish between saturated and unsaturated organic compounds with oxidizing reagents. The first test was carried out by treating . 5ml samples of ligroin and cyclohexane with 2- 3 drops of 3% solution of bromine in dichloromethane. The ligroin turned a brown color and the cyclohexane stayed clear. In the second test, 3% bromine in water was placed in three test tubes. Ligroine was added to the first two test tubes and one of these placed in a drawer and the other placed under the lamp. The tube in the drawer stayed the same and the tube under the light was colorless. The cyclohexane took on a purple tint with a strong odor. In the third test, potassium permanganate was added to ligroin and cyclohexane. The cyclohexane stayed clear and the ligroin stayed a dark purple. In the fourth test, sulfuric acid is added to ligroin and cyclohexane separately.
