I've tried rubber and wire brushes, rubber gloves, sticky rollers and velcro hair curlers to remove pet hairs from my car but none of them remove the stubborn ingrained hairs embedded in the upholstery easily. They only remove the hairs lying on or close to the surface unless you put an inordinate amount of effort into it.I want an easier method, so, is there a device which I can use with a vacuum cleaner to remove the embedded hairs which the other methods leave behind?
Thioacetamide decomposes when warmed in acid solution to produce H2S, some of which will dissociate in water to make H+ and HS-. The HS- and H2S will react with some metal ions to produce insoluble metal sulfides. It is a way of separating metal ions in a qualitative analysis scheme. In the case you site above, there is the possibility that chloride ion will not completely precipitate enough of the lead ions as PbCl2. The thioacetamide will produce PbS, which is much more insoluble than PbCl2, and it will reduce the concentration of Pb2+ ions in solution even more.. Thioacetamide has fallen into disuse because of the strong possibility that it will classified as a human carcinogen. (See the MSDS sheet: msds.chem.ox.ac.uk/TH/thioacetami The MSDS sheet sums it up: Personal protection: Safety glasses, gloves, good ventilation. Handle as a carcinogen. Now, with that being said, is it safe to use? I would be leery about using it in high school. In a college setting with more mature students and access to hoods and gloves, then it is probably safe. I can remember using it in college to do qualitative analysis. Of course, its carcinogenic potential was unknown at that time. Follow up Just to clarify something Robert said. Thioacetamide is used as an alternative to H2S produced some other way, but it should be pointed out that the thioacetamide produces H2S when it decomposes. The bottom line is that H2S in solution is what is going to react with the metal ions and thioacetamide is one way to produce it. The safety of thioacetamide is called into question not only because of the production of H2S, but because of its potential as a carcinogen.
Maybe you could try to put some cheap tint over it like the kind you can put on do it yourself prescription sunglasses. Just a thought.
