Preparation of Aluminium Bromide

Preparation of Aluminium Bromide. Perform the experiment in a fume cupboard ) Assemble an apparatus as shown in Fig. 122a. 

Lubricate the ground-glass joints in the apparatus with a concentrated sulphuric acid solution. Clean a piece of metallic aluminium with emery paper, make 10-12 g of shavings from it, and put it into flask 1. Pour 30 ml of dry bromine into dropping funnel 2. This amount of bromine is not sufficient for the aluminium to enter into the reaction completely (why is excess aluminium taken ) 

After termination of the reaction, heat flask I strongly with the flame of a burner and distil the obtained aluminium bromide in a stream of carbon dioxide into receiver 3. To remove traces of bromine, repeat the distillation in the apparatus shown in Fig. 122h 

Indicate the position of the rare-earth elements in Mendeleev s periodic table, the electron configurations and sizes of their atoms, and their oxidation states. 

Pour 1 ml of cerium nitrate into a test tube and add a few drops of sodium hydroxide. What happens Write the equation of the reaction. Act on the precipitate with an excess amount of the sodium hydroxide. Does cerium hydroxide react with sodium hydroxide  

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