Question

An unknown solution tested in this experiment gave a yellow-green flame test.

A. The solution likely contains sodium ions.
B. The solution likely contains copper ions.
C. The solution likely contains potassium ions.
D. The solution likely contains calcium ions.

Answer 1

The yellow-green flame test indicates that the solution likely contains sodium ions.

Step-by-step explanation:

The yellow-green flame test indicates that the solution likely contains sodium ions (option A). Sodium and its compounds impart a bright yellow color to a flame. This color is characteristic of sodium and can be seen when a wire dipped in a sodium salt solution is heated, resulting in the emission of a bright yellow light.