Lab report Essay Example | Topics and Well Written Essays - 500 words

Lab report - Essay ExampleApart from primary atomic number 13 obtained from bauxite, secondary ammonia aluminium and aluminium compounds are obtained through recycling. Recycling aluminum prevents depletion of aluminum ore reserves. Compared with primary work, production of secondary aluminum requires a lower amount of energy. (Davis, 1993)One compound that can be obtained by chemical treatment of used aluminum is potash alum. Potash alum or common alum ( green aluminum sulfate dodecahydrate, KAl(SO4)2.12H2O) is a double salt. The Al3+ ions in alum act as flocculating agent during irrigate treatment and purification and also as a blood congealer in medicine. (Atkins & de Paula, 2006)To investigate a assertable method for recycling used aluminum cans, potash alum was prepared from a piece of aluminum can. Feasibility of the recycling process was studied by calculating the percentage yield.Collecting and weighing aluminum. The aluminum beverage can was washed. A 58 cm piece of a luminum was down from the can. rouge from the outer surface of the can and plastic from the inner surface of the can were scraped off. The aluminum piece was cut into small squares. The aluminum squares were weighed and 0.996 g of aluminum was placed in a 250 mL beaker.Addition of potassium hydroxide. To the aluminum in the beaker, 50 mL of 1.4 M potassium hydroxide was added. The reaction mixture of aluminum and KOH was heated on a hot plate in the hood. Heating was stopped when the mixture glum grey.Vacuum filtering. Vacuum filtration apparatus was set up. The hot resultant role was vacuum filtered. The beaker used was rinsed with distilled water (5 mL) and this solution was also vacuum filtered. The filtrate obtained was cooled in an ice-water bath for a few minutes.Addition of sulfuric stinging and crystallization of alum. To the cooled filtrate, 20 mL of 9.0 M sulfuric