The fume hood in these old labs was odd. It was basically a Little firecracker loading 4th of July shirt raised island, about 8 feet in diameter, divided into four stations of equal area with individual air-locks. There was a central negative-pressure pump that drew all the chemical nasties out of the room via a plenum, or a pressure that’s slightly lower than ambient. Basically, even if the pump fails, the negative pressure will continue to draw out the evolved chemical ickmeisters.However, this steel shroud had about ½ of a centimeter between it’s outside diameter and the inside diameter of the polycarbonate outer shield.Oh, one more eccentricity of fluoroantimonic acid: It rapidly and explosively decomposes upon contact with water. Because of this property, fluoroantimonic acid cannot be used in an aqueous solution.Fun stuff, to be sure.Lucas and I made certain we watched the PDVSA chemical safety videos because we weren’t messing around with beans and tortillas here. I took copious notes as I tend to remember things a bit more lucidly that way
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Lucas, on the other hand, makes certain that the Little firecracker loading 4th of July shirt bottles we’re using, all glassware lined with Teflon (PTFE), as fluoroantimonic acid eats glassware for lunch; remain full. This reagent makes hydrofluoric acid (HF) look like Grape Kool-aid in comparison.In the lab proper, are large carboys filled with the various reagents that we’re consuming at a rapid rate. Since they’re all opaque from age and lack of maintenance, we more or less have to believe what the label on the bottle says.Besides, I don’t want to stick my finger, any of them, in nasty acid thinking it was water.There are other indications as well; the glassware isn’t the best in the world, nor is the housekeeping. So if you pour water into a porcelain reaction chamber and it fumes, well…best break out the litmus paper.
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