A method of separation useful for purification and isolation is________
Decantation
Crystallization
Evaporation
Filtration
An effective method for purification of volatile solids is________
Distillation
Crystallization
Sublimation
Recrystallization
Induced crystal growth can be achieved through_______
Seedling
Filtration
Pasteurization
Decantation
Sublimation first and seeding second. If you had ever done a crystallization you would know the answers to all of these.
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The method of separation that is useful for purification and isolation is filtration. To understand why filtration is the correct answer, let's look at the other options one by one:
1. Decantation: This method involves pouring off a liquid from a solid sediment that has settled at the bottom of a container. While decantation can be useful for separating some mixtures, it is not designed for purification and isolation.
2. Crystallization: This method involves obtaining purified solid crystals from a solution by first dissolving the solid in a suitable solvent and then allowing the solution to cool down to form crystals. Crystallization is primarily used to obtain a pure solid compound, rather than for the purpose of separation.
3. Evaporation: This method involves heating a mixture to evaporate the solvent, leaving behind the solute as a residue. Evaporation is useful for separating a solute from a solution, but it may not always result in complete purification or isolation.
4. Filtration: This method involves passing a mixture through a filter medium, such as filter paper or a porous material, to separate the solid components from the liquid or gas components. Filtration is particularly useful when the solid particles are larger or insoluble, allowing for effective separation and purification.
In summary, while all the methods listed can be employed for separation, filtration is specifically well-suited for the purpose of purification and isolation.