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.
Committee on Chemical Safety. New and Improved -- Flame Tests Demonstration (âRainbow Demonstrationâ) Presented by Jillian Meri Emerson, Staff Research Associate. Department of Chemistry. University of California, Davis. jlmemerson@ucdavis.edu. Safety Considerations. Barium chloride is highly toxic. Precautions must be taken to avoid ingestion of the salt or solution. Wear proper personal protective equipment when preparing solutions. Students should wear chemical. splash goggles and avoid contact with solutions when performing this experiment.