Explain the Following: Concentrated Nitric Add Appears Yellow When It is Left Standing in a Glass Bottle. - Chemistry

Explain the following:

Concentrated nitric add appears yellow when it is left standing in a glass bottle.

Solution

Although pure concentrated nitric acid is colorless, it appears yellow when left standing in a glass bottle due to the dissolution of reddish brown nitrogen dioxide gas in the acid. Nitrogen dioxide is produced because of the thermal decomposition of a portion of nitric acid.

4HNO₃ → 2H₂O + 4NO₂ + O₂

Concept: Nitric Acid - Laboratory Method of Preparation of Nitric Acid from Potassium Nitrate Or Sodium Nitrate

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2014-2015 (March) Science Paper 2

Q 6.3 Q 6.2.2 Q 7.1.1

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Explain the Following: Concentrated Nitric Add Appears Yellow When It is Left Standing in a Glass Bottle. - Chemistry

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