The flame tests for sodium and potassium are based on the emissions at 589 nm and 404 nm, respectively. When both elements are present, the Na⁺ emission is so strong that the K⁺ emission can be seen only by looking through a cobalt-glass filter.
(b) What does the cobalt-glass filter do?

Question

23-08-2022
Chemistry

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The flame tests for sodium and potassium are based on the emissions at 589 nm and 404 nm, respectively. When both elements are present, the Na⁺ emission is so strong that the K⁺ emission can be seen only by looking through a cobalt-glass filter.
(b) What does the cobalt-glass filter do?

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Tutorconsortium322 Tutorconsortium322 · Answer 1 · 2022-08-25T21:52:32+02:00

The cobalt glass filter acts as a barrier during the flame test to separate or filter the golden yellow color brought on by the sodium's presence, since it increases the visibility of the violet color.

What is cobalt glass filter?

Cobalt glass is a dark blue mixture of glass and cobalt metal, with the cobalt inclusions giving it its blue hue.

In flame tests, cobalt glass plates are used as an optical filter to block the unwelcome intense yellow light created by minute amounts of sodium while improving the capacity to discern violet and blue tones, much like didymium glass.

Learn more about cobalt glass filter here:

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The flame tests for sodium and potassium are based on the emissions at 589 nm and 404 nm, respectively. When both elements are present, the Na⁺ emission is so strong that the K⁺ emission can be seen only by looking through a cobalt-glass filter. (b) What does the cobalt-glass filter do?

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What is cobalt glass filter?

Otras preguntas

The flame tests for sodium and potassium are based on the emissions at 589 nm and 404 nm, respectively. When both elements are present, the Na⁺ emission is so strong that the K⁺ emission can be seen only by looking through a cobalt-glass filter.
(b) What does the cobalt-glass filter do?