On left:The slurry was then transfered to a 1L beaker placed in a ice bath, and slowly diluted to 1L with strong magnetic stirring. The blue color cleared up to a dark cyan blue colour. After 10min stirring, the blue solid was left to decant, leaving a very slightly blue supernatant. Half of the solution was filtered off, and the remaining supernatant diluted to 1l with stirring. After decantation, the now colorless supernatant was filtered off, leaving the solid in the beaker, and the first filtrate added, and diluted to 1L with stirring. The solid was then vacuum filtered, thoroughly washed with 200mL, and dried by suction for 5min. On left top :Decanted solid: On left bottom : Filtered and dried solid was then transfered to a pyrex dish, and heated on the hotplate to ~100°C. The caked solid quickly dried back to a very fluid powder, as dried silica gel, and was left at 100°C overnight. There were a few light white particules, which was considered to be talc from the latex gloves..
Posted on: Sat, 02 Aug 2014 17:36:50 +0000
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