Analysis of Alum

Analysis of Alum - Date: 9 November 2010 Title: Analysis of...

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Date: 9 November 2010 Title: Analysis of Alum, AlK(SO 4 ) 2 * 12H 2 O Purpose: The purpose of this experiment is to analyze alum, AlK(SO 4 ) 2 * 12H 2 O, by two techniques in order to verify its identity. By doing the experiment, the melting point and the mole ratio of hydrated water to anhydrous aluminum potassium sulfate can be obtained. This experiment is useful for determining the identity and properties of an unknown element. Hypothesis: The hypothesis is that the measured melting point and mole ratio of the alum and water should be precisely close to its actual values. Recording the temperature at which the solution undergoes reaction and heating the solution until it is almost completely dehydrated should give its melting point and mole ratio. Materials: Chemicals Aluminum potassium sulfate, AlK(SO 4 ) 2 * 12H 2 O (2.5 g) Tap water Lab Equipment 1 Beaker (150 ml) Alcohol burner Hot plate 2, Capillary tubes Mortar and pestle 1, Rubber band 2, Ring stand
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This note was uploaded on 02/20/2011 for the course CHEM 121 taught by Professor John during the Spring '11 term at Caldwell College.

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Analysis of Alum - Date: 9 November 2010 Title: Analysis of...

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