Question

Describe the test for sodium and potassium when both are present.

Answer 1

The simplest test for sodium and potassium when both are present is flame test. The test is given below :-

Just put your solution on flame if it gives yellow flame(when we see it from naked eyes) then sodium is present and if it shows purple-red flame (when we see it from blue glass ) then potassium is also present in the same solution.

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ROYALJATT

Answer 2

Flame test is used to identify the metal ion found in an ionic compound . If the compound is placed in the flame of burner , there may be characteristics colour given off by metal that can be seen by naked eyes.

--->If the salt containing sodium  and potassium is put on flame test it emits yellow light when viewed with naked eyes.
--->Purple red for potassium in the presence of sodium when viewed through blue glass.