Construct a flowchart for the crystallization of aspirin. You should start with
ID: 888675 • Letter: C
Question
Construct a flowchart for the crystallization of aspirin. You should start with aspirin, soluble impurities, and insoluble impurities. What does like dissolves like mean? The funnel used for a hot gravity filtration should have as short a stem as possible. Why Is this? When pouring the crystals into a Buchner funnel for collection, the flask must be swirled just prior to pouring. What is the purpose of this? It is usually not a good idea to take a melting point on the same day that crystals are collected on a Buchner funnel and allowed to simply air dry. What effect would this have on the melting point, and why? When removing insoluble impurities. what type of filtration should be used (vacuum or gravity)? Why is the advantage of using this system over the other? When collecting your product, what type of filtration should be used? What is the advantage of using this system over the other?
Explanation / Answer
Since we need to pour the complete content into the buchner funnel to filtrate, swirling the flask prevents the resettlement of the crystal at the bottom of the flask after it is dislodged from the bottom of the crystal with the help of a spatula. It also ease the pouring of the solvent crystal mixture into the bhchner funnel