what are the seperation techniques involved in obtaining pure alum from powdered mixture of alum and sand
The separation techniques involved in obtaining pure alum from a powdered mixture of alum and sand may include:
1. Dissolution: Alum is soluble in water, while sand is not. By adding water to the mixture, the alum will dissolve and can be separated from the sand.
2. Filtration: After the alum has dissolved in water, the sand can be removed by passing the mixture through filter paper. The sand will be retained on the filter paper while the alum solution passes through.
3. Evaporation: After filtration, the pure alum solution can be obtained by evaporating the water. The alum will crystallize out of the solution as the water evaporates.
4. Crystallization: The formed alum crystals can be separated from any remaining impurities by either gravity filtration or by using a vacuum filtration system.
By following these separation techniques, one can obtain pure alum from a powdered mixture of alum and sand.