As purified by recrystallization

As purified by recrystallization Video Clips.

We show that aluminum nitrate and strontium nitrate was purified by recrystallization. This is important because these two substances must be extremely pure for our next video to shed light in dark dust. First of all, aluminum nitrate from our previous video: www.youtube.com dry aluminum nitrate dissolved in water and filter all insoluble material. We were not able to filter before they dry in the previous video, because the particles are too small at this time. It mustcrystallize in large aggregates of particles that can be filtered. After filtration, drying the aluminum nitrate. The bag dryer can be useful here: www.youtube.com After carefully drying the crystals. Then you take the weight and add a mass of 20% water. So if I like 50g, add 10 g of water (or 10 ml of density is 1g/mL). Not solve all so carefully, the mixture until it melts. Then cover and allow to cool. Finally, crystallizepurest crystals. After the mixture cools to room temperature, and left for several hours. The liquid is decanted and discarded, and the impurities it is not required. The crystals are weighed again and again are recrystallized with 20% water. Once this is done. Dry the finished product. I started with 50g and 17g over. But now it is very pure. Better than 99% strontium nitrate must be clean. But it is not solubility changes with temperature so we thenfor ...

Keywords: Strontium, aluminum, nitrate, purification, recrystallization, phosphorescent, glow, in, the, dark, powder, chemistry, science, experiment

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