in our experiment, we get a 600mg commercial aspirin tablet and powdered it. Then we mix it with ethanol and let it evaporate in a water bath. After tha, we recrystallize it thru suction filtration...what is the use of ethanol in this experiment?
2007-02-09 15:39:03 · 3 answers · asked by john m 1 in Science & Mathematics ➔ Chemistry
ya, its simple . first to dissolve the impurities that dissolves in ethanol.then , the process of recrystallisation helps in separating the impurities from the mother liquor,followed by suction which helps to get pure sample which is devoid of impurities.
2007-02-09 21:26:10 · answer #1 · answered by SWEETY 2 · 0⤊ 0⤋
The idea was to get the active ingredient dissolved in the ethanol, and all the other impurities, which are not soluble in ethanol, left behind on the filter paper. The impurities would otherwise have reacted with the alkali (or whatever method you used to work out how much aspirin there was in the tablet).
2007-02-09 19:40:06 · answer #2 · answered by Gervald F 7 · 0⤊ 0⤋
I believe ethanol is just your recrystallization solvent. It doesn't react with the acetylsalicylic acid at all, just helps remove the impurities.
2007-02-09 15:49:10 · answer #3 · answered by alyskim 3 · 0⤊ 0⤋