What color flame does copper ii gluconate produce

The color flame is green.Because the metal cation in the molecule tends to release energy in the form of visible light.

Hope this helped

I would expect copper (II) gluconate to produce a green flame. This is because the metal cation in the molecule tends to release energy in the form of visible light. Many potassium compounds, when heated in a flame, emit purple light, while many copper compounds emit green light.