What chemicals are used for flame test?

In a general flame test, various chemicals are used to produce characteristic colors of flames, indicating the presence of specific elements. Here are some common chemicals used in flame tests and the colors they produce:

1. Lithium chloride (LiCl): Produces a crimson or deep red flame.

1. Sodium chloride (NaCl): Produces a yellow flame.

1. Potassium chloride (KCl): Produces a lilac or violet flame.

1. Calcium chloride (CaCl2): Produces an orange-red flame.

1. Strontium chloride (SrCl2): Produces a bright red flame.

1. Barium chloride (BaCl2): Produces a green flame.

1. Copper chloride (CuCl2): Produces a blue or green flame, depending on the concentration.

1. Boric acid (H3BO3): Produces a green flame.

1. Sodium carbonate (Na2CO3): Produces a yellow flame.

1. Rubidium chloride (RbCl): Produces a red-violet flame.

It's important to note that the color produced by a specific chemical can vary depending on factors such as the concentration of the chemical, the temperature of the flame, and the presence of other elements that may interfere with the coloration. Additionally, flame tests are qualitative and can provide a general indication of the presence of certain elements but are not precise quantitative measures.