ສຽງ​ທີ່​ແບ່ງປັນ

Experiment 4 III. Procedure: A. Synthesis Caution! Phenol is corrosive. 1. Pour 25 ml of concentrated sulfuric acid into 200 ml of water. 2. Add to the warm solution 20 grams of aniline slowly and with vigorous stirring. 3. Cool, and add 100 grams of ice. 4. Dissolve 16 grams of sodium nitrite in …

Experiment 4 III. Procedure: A. Synthesis Caution! Phenol is corrosive. 1. Pour 25 ml of concentrated sulfuric acid into 200 ml of water. 2. Add to the warm solution 20 grams of aniline slowly and with vigorous stirring. 3. Cool, and add 100 grams of ice. 4. Dissolve 16 grams of sodium nitrite in 100 ml of water, and add the solution in small quantities, with stirring, to the solution of aniline sulfate, until the amine has been diazotized. Test for free nitrous acid: Dip a stirring rod into th