Why the crystallisation is better than evaporation?

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ystallisation is better than evaporation because during EvaporationSome solids decompose or some, like sugar may get charred on heating to dryness.Some impurities may remain dissolved in the solution even after filtration which on evaporation contaminates the solid.

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because the substance after evaporation have some impurities but after crystallization you will get pure substance

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it's more pure

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hello

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during Evaporation Some solids decompose or some, like sugar may get charred on heating to dryness...... Some impurities may remain dissolved in the solution even after filtration which on evaporation contaminates the solid.... That'swhy....

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kriti khobragade

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Crystallisation is better than evaporation because during evaporation some impuorities may left in evaporation.

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Because ramit bhajwani in facebook is mad

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The crystallization is better than evoporation because after crystallization have no impurties but after evaporation the substance were impure.....

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Why Crystallization is Better than Evaporation

Crystallization and evaporation are both commonly used methods for the separation and purification of solids from a solution. However, crystallization offers several advantages over evaporation, making it a preferred technique in many applications.

1. Efficiency of Purification:
Crystallization is a highly efficient purification method as it allows for the separation of a desired solid from impurities in a solution. During the process, the solute molecules arrange themselves in a highly ordered crystal lattice, leaving behind impurities that do not fit into the crystal structure. In contrast, evaporation only concentrates the solution, leaving behind a residue that may still contain impurities.

2. Selectivity:
Crystallization offers greater selectivity compared to evaporation. By controlling various parameters such as temperature, solvent composition, and cooling rate, it is possible to selectively crystallize the desired compound while leaving impurities in the solution or as amorphous solids. This selectivity is crucial in industries such as pharmaceuticals, where the purity of the final product is of utmost importance.

3. Yield Improvement:
Crystallization generally provides higher yields compared to evaporation. During the process, the solute molecules come together to form crystals, which can be easily separated from the solution. This allows for the recovery of a higher percentage of the solid product. In evaporation, the resulting residue may not be completely dry, leading to potential loss of the desired product.

4. Control of Particle Size and Morphology:
Crystallization offers control over the particle size and morphology of the resulting crystals. By adjusting the cooling rate and other process parameters, it is possible to obtain crystals of specific sizes and shapes. This control is particularly advantageous in industries such as food and pharmaceuticals, where the physical characteristics of the solid product can affect its properties and performance.

5. Separation of Isomers:
Crystallization is an effective method for separating isomers, compounds with the same molecular formula but different structural arrangements. By carefully manipulating the conditions, it is possible to selectively crystallize one isomer while leaving the other in the solution. This ability to separate isomers is crucial in various fields, including the pharmaceutical and chemical industries.

In conclusion, crystallization offers several advantages over evaporation in terms of efficiency, selectivity, yield, control over particle size and morphology, and the ability to separate isomers. These benefits make it a preferred method for the separation and purification of solids from a solution in various industries.

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Hi

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