a- At the bottom of the trough, you will observe crystal formation of copper sulfate as the water evaporates. The crystals will continue to grow until there is no more water left to evaporate.
b- Crystallization has several benefits in various fields. In the chemical industry, it is used to purify substances by removing impurities and separating mixtures. In pharmaceuticals, it is used to purify drugs and create more effective and stable formulations. In metallurgy, it is used to extract pure metals from ores. Crystallization can also be used in the food industry to create high-quality products such as chocolates and candies with a smooth texture and uniform appearance.
Overall, crystallization is a useful technique for obtaining pure substances and for creating well-defined crystals with desirable properties. It allows for the separation and purification of mixtures and can lead to the production of higher quality products in various industries.