Ammonia and Studying of Its Properties

At what temperature does ammonia liquefy Open the cock of funnel 2 and add dropwise the concentrated ammonia solution, seeing that the ammonia does not evolve too intensively (the bubble counter ). What do you observe in receiver 5  

Extract the electrodes and drop a small piece of pure metallic sodium thoroughly dried with filter paper into the liquid ammonia. What happens What explains the colouring of the liquid Again introduce the electrodes into the liquid ammonia. How did the electrical conductance of the solution change  

Let the ammonia evaporate. What substance remained in the apparatus Do not wash the apparatus with water, but hand it in to the laboratory assistant Why What explains the use of ammonia in refrigerating machines  

Open the gas meter cock and, without stopping the ammonia stream, again bring an ignited splinter to the mouth of tube 1. What do you observe now Write the equation of the reaction. 

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