Nitric acid - Wikipedia
Nitric acid is normally considered to be a strong acid at ambient temperatures. There is some disagreement over the value of the acid dissociation constant, though the pK a value is usually reported as less than −1. This means that the nitric acid in diluted solution is fully dissociated except in extremely acidic solutions.
New Modeling of Nitric Acid Dissociation Function of Acidity and ...
Nitric acid, from a concentration greater than 10 –2 mol·L –1, behaves as a weak acid, which means that its dissociation is incomplete in an aqueous medium. (1) The purpose of this publication is to determine the different dissociation constants of the nitric acid in a range of acidity varying from 1.5 to 8.5 mol·L –1 and in a range of ...
16.4: Acid Strength and the Acid Dissociation Constant (Ka)
2020年8月14日 · For example, nitrous acid (\(HNO_2\)), with a \(pK_a\) of 3.25, is about a million times stronger acid than hydrocyanic acid (HCN), with a \(pK_a\) of 9.21. Conversely, smaller values of \(pK_b\) correspond to larger base ionization constants and hence stronger bases.
Dissociation of HNO3 in water revisited: experiment and theory
2024年5月14日 · Nitric acid dissociation in water is studied as a function of concentration, employing experimental techniques (1H NMR spectroscopy and calorimetry), quantum chemical methods (B3LYP and PBE functionals for molecular clusters) and molecular dynamics simulations (the PBE-D3 functional for solutions under perio.
determine the different dissociation constants of the nitric acid in a range of acidity varying from 1.5 to 8.5 mol·L −1 and in a range of temperature varying from 50 to 95 °C.
Dissociation of HNO 3 in water revisited: experiment and theory
2024年4月23日 · Nitric acid dissociation in water is studied as a function of concentration, employing experimental techniques (1 H NMR spectroscopy and calorimetry), quantum chemical methods (B3LYP and PBE functionals for molecular clusters) and molecular dynamics simulations (the PBE-D3 functional for solutions under periodic boundary conditions).
Dissociation of HNO3 in Water Revisited : Experiment and Theory
2024年5月29日 · Nitric acid dissociation in water is studied as a function of concentration, employing experimental techniques (1H NMR, calorimetry), quantum chemical methods (B3LYP and PBE functionals for ...
New Modeling of Nitric Acid Dissociation Function of Acidity …
2018年6月19日 · Using data from the literature and some nitrous acid analyses, it was possible to determine the balance sheet of all different aqueous nitrogen species for a total nitric acidity ranging from 1.5 to 8.5 mol·L -1 and for temperature ranging from 50 to 95 °C with the assumption that the use of a refrigerant column makes gaseous species negligible.
Raman spectroscopic determination of the degree of dissociation …
2019年11月10日 · Recent Raman spectroscopic investigations on the dissociation of nitric acid by Irish and Puzic showed that the signal of the nitrate ion at 1,048 cm −1 is asymmetrically broadened at a concentration of about 3 mol·L −1 and above. The asymmetric widening was attributed to the presence of an ion pair (H 3 O + ·NO 3−).
Depth-Dependent Dissociation of Nitric Acid at an Aqueous …
The acid dissociation of a nitric acid HNO3 molecule located at various depths in a water slab is investigated via Car−Parrinello molecular dynamics simulations. HNO3 is found to remain molecular w...