Alum Lab Conclusion Essay

The purpose of this laboratory was to substance abuse two different techniques to attempt to identify the melting evince and the mole ratio of hydrated urine to anhydrous aluminum, potassium, and sulfate of AlKSO4. The hypotheses were if the alum was put in a capillary tube the melting point of alum go forth be able to be determined and the water of hydration in alum crystals will be possible to determine if the alum is heated with a Bunsen burner. ResultsE actually compound has its suffer unique sets of chemical properties. Alum crystals be of great purity and are easily prepared. Because of their purity, they are oftentimes used in dyeing cloth, where the alum acts as a source of Al+3 ions which are not contaminated. These properties can be determined experiment whollyy and in this experiment as mentioned above, a some properties of alum were being determined. The first test was to identify the melting point of the alum and compare it to the produce value that already exis ts. The melting point of a substance is a property that indicates at what temperature it goes through and through a state change of solid to liquid. In order to do this, the alum was placed in a water bath and heated. In the second part of the experiment, the alum was analyzed for water of hydration.When an noggin compound is prepared in aqueous solution and isolated by crystallization, water molecules are interconnected into the compound in fixed proportions. The amount of water incorporated is referred to as the water of hydration. This amount cannot be predicted, so it must be determined experimentally. In order to do this, the alum was heated until all the water was driven off. After the completion of the experiment, it was discovered that the results extracted were very close to the expected results.As seen in the data table, the literature melting point and the one obtained in the experiment were only a teensy more than .5 away from each other which means pretty accurate re sults were taken away from this experiment. In regards to the second part of the experiment, a way to see precision in the results would have been to do a second heating of the alum in the crucible. Time, however, did not allow for this so if the experiment was to be through with(p) again, better results may be obtained by another trial of that part. This experiment overall was a very good example of how certain properties of substances can only be obtained through experiment. It also showed new techniques of ascertain properties like melting point and water of hydration that could be used in future experiments.