[a Accessibility Mode Find Prit 2) The solubility of sulfanilamide is 210 mg in

Question

[a Accessibility Mode Find Prit 2) The solubility of sulfanilamide is 210 mg in boiling ethanol and 14 mg at 0C Assume you are going to recrystallize 300 mg sulfanilamide. a) How much boiling ethanol do you theoretically have to use? b) Given your answer to part a, how many mg of sulfanilamide will remain in the ethanol at 0C? c) What is the maximum amount of pure sulfanilamide could you recover? d) Calculate the % recovery based on the number of mg of pure sulfanilamide you obtained and how much sulfanilamide you started with. (https://sciencing.com/calculate-percentage-recovery-produet) If a student's % recovery is more than 100%, what reason(s) could be responsible for this? e) What was your melting point? What can you conclude about the purity of your sulfanilamide based on the melting point? Just for the record, your melting point cannot be higher than the literature melting point. If it is, then you either overshot the melting point or the MeltTemp you used needs to be calibrated because it is not giving the correct temperature value.

Explanation / Answer

a) Solubility of sulfanilamide in boiling ethanol = 210 mg/mL

Sulfanilamide required for recrystallization = 300 mg

Volume of boiling ethanol required = 210 / 300 = 0.7 mL

b) Solubility of sulfanilamide in ethanol at 0 = 14 mg/mL

Amount of Sulfanilamide will remain in the ethanol at 0 = 14 x 0.7 = 9.8 mg

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