Barium salts are highly toxic.
Chemicals and Solutions:
Flame test cation solutions (methanolic)
dishes with covers
Place the cation solutions into dishes and ignite them with a match. To put them out, simply cover the dish.
Barium gives a green flame
Strontium gives a red flame
Lithium gives a red flame
Calcium gives a red orange flame
Sodium gives an orange flame
Potassium give a violet flame
The metal ions are raised to an excited state by the high temperature of the flame and then return to the ground state emitting light of characteristic frequencies.