Percent yield actual yield theoretical yield x 100. Mass of pure sample after recrystallisation present. Youre going to pre-weight an empty test tube add 4 drops of aniline and then weigh the test tube again to determine exactly how much aniline you added.
The impurities may include some combination of insoluble soluble and colored impurities.
The impurities may include some combination of insoluble soluble and colored impurities. You then just divide your obtained yield by the theoretical yield and 100. SAP is the substance amount after purification. In a recrystallization reaction the original substance is recrystallized after which its recovery value can be computed.