Concentrated Nitric Acid
Nitric acid is a chemical compound with the chemical formula HNO3 and a molecular weight of 63.01. Pure nitric acid is a colorless liquid with a pungent smell. Concentrated nitric acid is a mixture. The mass fraction of commercially available concentrated nitric acid is about 68%, the density is about 1.4 g/cm³, and the boiling point is 83 °C. It is volatile and can be dissolved in any proportion Water, similar to sulfuric acid, will release a lot of heat when it is miscible, so it needs to be stirred constantly, and only concentrated nitric acid can be added to water, not the other way around.