1. FORMATION OF UREA NITRATE: Dissolve 1/2 gram of urea in 1/2 mL of water. Add 2 drops of concentrated nitric acid to 2 drops of this solution. What is the observation and equation?
2. FORMATION OF UREA OXALATE: To 2 drops of the urea solution, add 2 drops of saturated oxalic acid solution. What is the observation and equation?
3. FORMATION OF BIURET: Place 3 gm of dry urea crystals in a pyrex test tube and heat it to a high temperature. Observe then test the vapors evolved with moist red litmus paper. Cool the test tube and examine the residue. What is the observation and equation?
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