How would explain the appearance of a yellow/orange color in a sove burner flame when water salted with NaCl

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Originally Posted by drmr

how would explain the appearance of a yellow/orange color in a sove burner flame when water salted with NaCl

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This is due to the thermal excitation of the sodium ions by the heat of the flame.

You see this in yellow sodium vapor street lamps and in yellow fireworks displays.