Question

In fireworks, the heat of the reaction of an oxidizing agent, such as KClO₄, with an organic compound excites certain salts, which emit specific colors. Strontium salts have an intense emission at 641 nm, and barium salts have one at 493 nm.
(a) What colors do these emissions produce?

Answer 1

• In the visible spectrum, strontium exhibits a red hue at a wavelength of 641 nm in its salts.

• In the visible spectrum, barium salts emit a green color at a wavelength of 493 nm.

What is oxidizing agent?  

• An oxidizing agent is a substance that obtains or "accepts" or "receives" an electron from a reducing agent in a redox chemical process.
• Or to put it another way, an oxidizer is anything that oxidizes something else.

• Halogens, potassium nitrate, and nitric acid are a few examples of oxidizing substances.
• A reducing agent, also known as a reductant, gets oxidized and loses electrons during a chemical process.
• The electron donor, or reducing agent, is a substance that is normally in one of its lower potential oxidation states.

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