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.
We decided that unknown 2 appeared to be the barium nitrate because both the barium nitrate and unknown 2 burned a yellow, green color and had a slight brown tint to the flame, and they both had about 480 to 550 nanometer wavelength.