Using the following solubility table for a given compound, which option would be
ID: 522941 • Letter: U
Question
Using the following solubility table for a given compound, which option would be the correct choice to perform recrystillization and why?
3070, 50:50 Ethanol Water Ethanol Water Water CH2C12 oo c 25cc 100 rt b.p rt. b.p. rt b.p oc o oc 25 oc 78 c o 250c 77°C 0°C 25°C 40°C no no yes no no yes yes yes yes Lno Lno Lno Product Starting material no no yes yes yes yes yes yes yes no no Lno Table 1. Solubility at 500 mg/mL (note that the compound may still be soluble at 100 mg/mL even if a box above indicates "no." Recrystallization Using the solubility information in Table 1 as a guide,Explanation / Answer
Ethanol and Water (30:70) System is suitable for Recrystallization process.
The process Recrystallization means the compound and impurities are dissolved in a suitable solvent sothat the impurities or compound dissolve in that solvent at high temperature and form clear solution. By cooling either the compound or the impurities are seperated from the solution as solid matter.
The given Ethanol and Water 30:70 mixture does not form the product or clear solution at low teperature but it can at higher temperature and remaining mixture not have that difference so it is only suitable for the Recrystallization process.
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