PHydrion, solution preparation

Basic Hydrolysis. In a small Erlenmeyer flask, mix 10 mL of 3 M sodium hydroxide solution and 1 g of the nitrile. Heat the mixture to boiling and note either the odor of ammonia or the color change that occurs when a piece of moist pHydrion paper is held over the flask. After the mixture is homogeneous, cool and then acidify it. If the acid solidifies, collect the crystals by vacuum filtration. If it is a liquid. extract the acidic solution with small portions of diethyl ether, dry and decant the ethereal solution, and then remove the solvent by one of the techniques described in Section 2.29. The residue is the acid. Prepare a suitable derivative of the acid (Sec. 25.13). 

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