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Soluble impurities are removed by a process of vacuum filtration
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∙ 13y ago
Soluble impurities are removed during recrystallization by dissolving the impure solid in a hot solvent, then filtering the hot solution to remove insoluble impurities. The solution is then cooled slowly, allowing the pure compound to crystallize out while the impurities remain in solution. The pure crystals can be separated from the solution by filtration.
Amanlv Mthiwa
are disolved in the cold saturated solution after precipitation of the desired compound.
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How insoluble impurities removed during recrystallization?
Insoluble impurities are removed during recrystallization by filtration. After dissolving the mixture in a hot solvent and allowing it to cool, the desired compound forms crystals while the insoluble impurities remain suspended in the solution. The crystals are then collected through filtration, separating them from the impurities.
What impurity is removed during the recrystallization process?
During the recrystallization process, impurities present in the initial sample are removed by dissolving the sample in a hot solvent and then allowing it to cool slowly. As the solution cools, impurities are excluded from the growing crystal lattice and remain in the solvent or are trapped within small crystals that are later filtered out. The final purified crystal product is then separated from the remaining solution.
Assuming that charcoal and sugar are the main impurities present in a sample of crude acetanilide explain how recrystallization from water would remove each..?
Recrystallization from water would remove charcoal impurities by dissolving the acetanilide in hot water, as charcoal is insoluble in water. The sugar impurities would also be removed because they are more soluble in hot water than in cold water, so they would remain dissolved during the recrystallization process and be removed in the mother liquor.
What is the disadvantage of having excess solvent during recrystallization?
Having excess solvent during recrystallization can result in a lower concentration of the desired compound in the final crystal product. This can reduce the purity of the compound and make it more difficult to separate from impurities. Additionally, excess solvent can increase the time required for the recrystallization process to complete.
What is the substance which reacts with unwanted impurities in ores to form a fusible mass which can easily be removed?
The substance that reacts with unwanted impurities in ores to form a fusible mass is called a flux. Fluxes are added during the smelting process to help separate the impurities from the desired metal, forming a slag that can be easily removed.
How insoluble impurities removed during recrystallization?
Insoluble impurities are removed during recrystallization by filtration. After dissolving the mixture in a hot solvent and allowing it to cool, the desired compound forms crystals while the insoluble impurities remain suspended in the solution. The crystals are then collected through filtration, separating them from the impurities.
What impurity is removed during the recrystallization process?
During the recrystallization process, impurities present in the initial sample are removed by dissolving the sample in a hot solvent and then allowing it to cool slowly. As the solution cools, impurities are excluded from the growing crystal lattice and remain in the solvent or are trapped within small crystals that are later filtered out. The final purified crystal product is then separated from the remaining solution.
Assuming that charcoal and sugar are the main impurities present in a sample of crude acetanilide explain how recrystallization from water would remove each..?
Recrystallization from water would remove charcoal impurities by dissolving the acetanilide in hot water, as charcoal is insoluble in water. The sugar impurities would also be removed because they are more soluble in hot water than in cold water, so they would remain dissolved during the recrystallization process and be removed in the mother liquor.
How are insoluble impurities removed during recrystallization?
Using a gravity filtration. The desired compound that is dissolved in the heated solvent will pass through the filter and any insoluble impurities will be caught in the filter.
How is the melting of an impure compound expected to change with recrystallization?
During recrystallization, impurities are removed as the compound is dissolved and then slowly cooled to allow for the formation of pure crystals. As a result, the melting point of the compound should increase after recrystallization because the presence of impurities lowers the melting point of the compound.
For what purpose is charcoal used in recrystallization?
Activated carbon is also known as decolorizing carbon. It is used to remove the colored impurities from the sample. Activated carbon provides a high surface area to absorb colored impurities. http://designer-drugs.com/pte/12.162.180.114/dcd/chemistry/equipment/recrystallization.html
Why cannot agitate when Recrystallization?
Agitation during recrystallization can introduce impurities by causing crystals to form too quickly, trapping impurities within the crystal lattice. It can also lead to mechanical losses due to crystal breakage. Overall, agitation disrupts the controlled crystallization process, resulting in lower purity of the final product.
What is the disadvantage of having excess solvent during recrystallization?
Having excess solvent during recrystallization can result in a lower concentration of the desired compound in the final crystal product. This can reduce the purity of the compound and make it more difficult to separate from impurities. Additionally, excess solvent can increase the time required for the recrystallization process to complete.
What is the substance which reacts with unwanted impurities in ores to form a fusible mass which can easily be removed?
The substance that reacts with unwanted impurities in ores to form a fusible mass is called a flux. Fluxes are added during the smelting process to help separate the impurities from the desired metal, forming a slag that can be easily removed.
Why slag is produced in metal extraction?
Slag is produced during metal extraction as a byproduct of the reaction between impurities in the ore and the flux added to extract the desired metal. The slag, which consists of non-metallic compounds, forms from the impurities that are removed during the smelting process. It helps to separate the impurities from the metal being extracted.
Why is the second crop of crystals in recrystallization less pure than the first?
The second crop of crystals in recrystallization is less pure than the first because impurities have less time to incorporate into the crystal lattice during rapid crystallization. As the solution cools and crystals form, impurities are pushed to the remaining liquid, resulting in a higher concentration of impurities in the second batch of crystals.
What is the function of limestone in the furnace?
Limestone is added to the furnace as a flux to help remove impurities from the iron ore during the iron-making process. It reacts with the impurities to form slag, which can be easily removed from the molten iron.
