Suction Filter
Urgent O-Chem Question! Been trying to figure it out for hours, please help!!!?
The solubility of phenacetin in water at 0 degrees C is 0.54g per 100 mL and 5.0g per 100 mL at 100 degrees C.
a)What is the minimum amount of solvent needed to recrystallize 0.200g of phenacetin? How much would be lost in the recrystallization?
b)What is the maximum mass of phenacetin that can be recovered when the chilled solution is suction filtered?
c)Where is the missing phenacetin?
You start your recrystalisation process at 100°C. You want to have a saturtaed solution at this temperature. The solubility of phenacetin is 5.0g in 100ml solvent. You have 0.200g. Therefore you need to have a soution voume of: 0.2/5.00*100 = 4ml
At 0°C the 4ml of solvent would be able to dissolve: 4/100*0.54 = 0.0216g
Therefore: 0.200-0.216 = 0.1784g phenacetin will crystalise out and be recovered in the filter. 0.0216g will pass through the filter with the solvent.
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