Guruh talabasi Bozorboyev Farruxbek

Commercially available nitric acid is an azeotrope with water at a concentration of 68% HNO3. This solution has a boiling temperature of 120.5 °C (249 °F) at 1 atm. It is known as "concentrated nitric acid". Pure concentrated nitric acid is a colourless liquid at room temperature.

• Commercially available nitric acid is an azeotrope with water at a concentration of 68% HNO3. This solution has a boiling temperature of 120.5 °C (249 °F) at 1 atm. It is known as "concentrated nitric acid". Pure concentrated nitric acid is a colourless liquid at room temperature.
• Two solid hydrates are known: the monohydrate (HNO3·H2O or [H3O]NO3) and the trihydrate (HNO3·3H2O).
• An older density scale is occasionally seen, with concentrated nitric acid specified as 42°