The Water Aspirator A Vacuum Source

This dissipates any superheated areas so that when you add the activated charcoal, the solution doesn t foam out of the flask and onto your shoes. 

Add the activated charcoal. Put a small amount, about the size of a pea, n your spatula, then throw the charcoal in. Stir. The solution may turn black. Stir and heat. 

Set up the gravity filtration and filter off the carbon. It is especially important to wash off any product caught on the charcoal, and it is really hard to see anything here. You should take advantage of fluted filter paper. It should give a more efficient filtration. 

have some extra fresh solvent heated as well. You ll need to add a few milliliters of this to the hot solution to help keep the crystals from coming out on the filter paper. And you ll need more to help wash the crystals off of the paper when they come out on it anyway. 

This solution should be much cleaner than the original solution. If not, you ll have to add charcoal and filter again. There is a point of diminishing returns, however, and one or two treatments is usually all you should do. Get some guidance from your instructor. 

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