I know h20 is the worst solvent but what if it asked for the best solvent what w

Question

I know h20 is the worst solvent but what if it asked for the best solvent what would The answer be ? And why
22. A series of organic solubility curves are shown below, for a variety of solvents. The y axis is amount of solvent per unit volume (mg/mL) and the x axis is degrees C. ACN 50 - Acetone 40 30 20 10 45 50 20 25 30 35 40 10 15 a. Which is the worst solvent for crystallization for this compound? (3) b. Justify your answer to part (a) in one sentence (3) Use the triangle solvent curve (Hac) to answer the following questions: I. How much of the solvent will be needed to dissolve 0.50 g of compound, at 50 °C? (4) Il. How much solute will remain in this solution when it is cooled to 10 °C? (4)

Explanation / Answer

For the triangle solvent curve i.e. HAc, in the part (i) at 50 deg C, we have solubility =39 mg/ml i.e. 39 mg 0r 0.039 g of compound will dissolve in 1 ml solvent, so 0.50 g compound will require 0.50 /0.039=12.82 ml solvent

(ii) similarly at 10 deg C, we hace solubility =15 mg/ml i.e. for 1 ml there is 15 mg solute so, for 12.82 ml there is 15X 12.82=192.3 mg or 0.1923 g solute

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