Valpolicella Ripasso is a form of Valpolicella Superiore made with partially dried grape skins that have been left over from fermentation of Amarone or recioto. Winemaking in the region has existed since at least the time of the ancient Greeks.
Barium chloride, or any other barium salt, should burn with a green flame. When a barium salt is burned, the thermal energy is transferred to the outer electrons of the barium ions. They gain enough energy to excite them to a higher energy level. They then drop back to their ground state, releasing energy.
Barium is a metal, but has no significant uses as such. A significant medical use of barium is to enhance x-ray images of the intestinal tract. Barium has a high atomic number and absorbs x-rays strongly. A thin paste of barium sulfate, BaSO 4, and water is is swallowed to coat the alimentary canal.This gives greater definition and contrast to the x-ray images of the tract.The low solubility of barium sulfate minimizes the toxic effects which might occur with other barium compounds.The mineral form of barium sulfate is called barite.his gives greater definition and contrast to the x-ray images of the tract. The low solubility of barium sulfate minimizes the toxic effects which might occur with other barium compounds. The mineral form of barium sulfate is called barite.