Sorting glassware

There are all sorts of variations, but they boil down to this Y ou ve taken all this time to dry your glassware only to put water in it. Writers of lab manuals are very tricky about this. Perhaps they say you ll be using steam. Or maybe 5% aqueous sodium bicarbonate solution. Or even that a byproduct of your reaction is H20. Condense steam and you get what An aqueous solution has what for a solvent H20 is what ... 

Buckets, tubs, funnels, and all sorts of containers of this whitish, opaque, pliable plastic can be found for pennies at any discount or grocery store. These containers are stackable, easy to clean, never break and will save a chemist a fortune in glassware. As was mentioned earlier, plastic ware is starting to make its mark in biological and chemical labs. Buchner funnels, side arm flasks, graduated cylinders and even separatory funnels come in PP and PE. These glassware substitutes are the absolute choice for today s chemists as they are unwatched, versatile and 1/10 the cost of glass. If the chemist is unsure what plastic a container is then she can look for the letters PP or PE somewhere on the product. 

Any glass apparatus which has any sort of crack, chip, flaw or even dirty, after careful examination, must be rejected immediately. More so, even a minute hair-line crack in a glassware meant for use in an assembly under an evacuated system are absolutely dangerous and should be discarded promptly. 

One possibility is to change Si02 into some other chemical that can be easily purified. This is impractical because Si02 is a very stable material and is inert to most simple chemical reactions. This is why glassware is so useful in chemistry. Another possibility is to remove A1 and Fe from Si by sorting, perhaps with the assistance of magnets. But A1 and Fe are not present in the Si as lumps rather Fe and A1 are atomically dispersed in the silicon. 

Do not discard syringes and needles into pans containing pipets or other glassware that must be sorted out from the syringes and needles. 

Sorting. Hazards include heat, mechanical injury, broken glass, and transportation of glassware. 

Molding is the primary method of converting plastic materials into finished products. Another age-old technique, humans have molded all kinds of materials, in all kinds of ways, including bricks, glassware, and all sorts of metal parts. Plastics molding usually involves the use of closed molds, and usually involves a combination of heat and pressure. 

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