Consider a crystallization of sulfanilamide in which 10ml of hot 95% ethyl alcohol is added to...

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Chemistry

Consider a crystallization of sulfanilamide in which10ml of hot 95% ethyl alcohol is added to 0.10g of impuresulfanilamide. After the solid has dissolved, the solution iscooled to room temperature and then placed in an ice water bath. Nocrystals form, even after scratching with a glass rod. explain whythis crystallization failed. What would you have to do at thispoint to make the crystallization work??

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3.8 Ratings (575 Votes)

You havent been able to form a nucleus around which crystallization can occur This if very common in new labs where the condtions are relatively pristine Old labs have more things floating around Your scratching didnt work Bummer So your volume still may be too high You want to concentrate it down to at least half volume And you really want crystallization to start from warm solution Slow crystallization from warm solution gives the best results OR The student recoved 80 of the impurity in the biphenyl You might expect biphenyl to dissolve in benzene See Answer

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