Crystallizing dishes are commonly used in the process of crystallization, where a solid substance precipitates out of a solution in the form of crystals. In this process, a solution containing the dissolved substance is heated until it becomes supersaturated, meaning it contains more solute than can normally be dissolved. As the solution cools, the excess solute crystallizes out, forming crystals in the crystallizing dish.
The flat bottom of the dish provides a large surface area for crystallization to occur, while the spout allows for controlled pouring of the solution. Crystallizing dishes come in various sizes to accommodate different volumes of solution and types of experiments. They are essential tools in many chemistry labs for purifying substances and isolating crystals for further analysis.