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Observations: The fluorene completely dissolve the toluene almost instantly. String like crystals appears on the solution when it was cooling. The pure sulfanilamide appears yellow when wet however, after it was dry returns to a white color Data: Weight of Impure Sulfanilamide: 0.80 grams Weight of Flask: 57.02 grams Weight of Flask + Pure Sulfanilamide: 57.82 grams Weight of Pure Sulfanilamide: 0.70 grams Pure Sulfanilamide: 155-160 degrees Celsius Percent Recovery: 0.70/0.80 x 100%= 87.6% Weight of Impure Fluorene: 0.78 grams Weight of Flask: 30.15 grams Weight of Flask + Pure Fluorene: 30.96 grams Weight of Pure Fluorene: 0.57 grams Melting Point: pure Fluorene: 114-118 degrees Celsius Percent Recovery: .57/.88 x 100%= 73% Post-lab Question:   Which solvent did you determine was best for the recrystallization of fluorene? Methyl alcohol, water and toluene were the three solvents tested.   Methyl was the best for rec...

Aqueous Extraction Observation Round 15 drops of HCl were used to turn the NaOH extract 1 acidic. Around 30 drops of HCl were used to turn the NaOH extract 2 acidic. When the HCl was added to the NaOH extract 1 precipitates form on the top. Data (Unknown 1) The purified compound is Fluorenone Melting point of unknown 1:  80 °C - 88 °C Initial mass of unknown: .39 g Extraction mass of unknown: .28 g %extraction= .28/.39 x 100% = 72% Question- Identify the neutral compound. Fluorenone Was your extraction effective at purifying it? My extraction was effective at purifying the neutral compound. The first NaOH extraction formed precipitate when the HCl was added. This shows that NaOH was effective at removing the acid impurity. When I obtain the melting point for the neutral compound. The compound started to melt at around 80°C and fully melts at 88°C. With the data given in the Organic Chemistry 1 manual figure that the melting point rage that I ...