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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.
(c) Why is KClO₄ used as an oxidizing agent in fireworks rather than NaClO₄?

Respuesta :

An inorganic salt with the chemical formula KClO₄ is potassium perchlorate. It is the least soluble of the alkali metal perchlorates and a powerful oxidant to create the oxygen required for the combination to burn inside the firework.

Whereas, sodium perchlorate resembles white sand. It is a component of medicines, explosives, jet fuels, and other compounds.

What is an oxidizing agent ?

  • In a redox chemical reaction, an oxidizing agent is a substance that "accepts" or "receives" an electron from a reducing agent.
  • So any substance that oxidizes another substance is an oxidizer.
  • Oxidizing substances include things like halogens, potassium nitrate, and nitric acid.
  • In a chemical process, a reducing agent, also known as a reductant, loses electrons and is oxidized.
  • The electron donor is a reducing substance, which is normally in one of its lower oxidation states.

Learn more about oxidizing agent here:

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