Organic 2 Review Problem 368

Organic 2 Review Problem 368 - 3 52 P RACTICAL ORGANIC...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
352 PRACTICAL ORGANIC CHEMISTRY lactate add i ml. of cone. H 2 SO 4 and warm gently. A brisk efferves- cence takes place, CO being evolved together with varying amounts of CO 2 and SO 2 . The mixture blackens considerably, but there is no marked charring. 2. lodojorm reaction. To 0-5 ml. of lactic acid add 10% NaOH solution until alkaline to litmus. Then add 5 ml. of 10% KI solution and 10 ml. of freshly prepared sodium hypochlorite solution and mix well. A yellow precipitate of iodoform separates out almost immediately in the cold. Tartaric acid. [-CH(OH)COOH] 2 . 1. Sulphuric acid test. Warm 0-5 g. of tartaric acid or a tartrate with i ml. of cone. H 2 SO 4 . Heavy charring takes place, CO and SO 2 being evolved. 2. Reduction of ammoniacal silver nitrate. Add i drop of dil. NaOH solution to about 5 ml. of AgNO 1 solution, and add dil. NH 3 solution drop by drop until the silver oxide is almost redissolved. Add AgNOg solution until a faint but permanent precipitate is obtained (see p.525). Then add 0-5 ml. of a neutral
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/19/2011 for the course CHM 2211 taught by Professor Castalleano during the Fall '06 term at University of Florida.

Ask a homework question - tutors are online