Question

nitric acid prepared in labaratory is yellow why

Answer 1

Hello:)

Nitric acid prepared in the laboratory is yellow in colour due to the dissolution of reddish brown coloured nitrogen dioxide gas in acid.

When concentrated nitric acid is produced, a part of it decomposes as:

4HNO₃--> 4NO₂ + 2H₂O + O₂

This NO₂ dissolves in the solution and produces a yellow colour.

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