They are formed by the action of HNO3 on metals, metallic oxides and also by the neutralization of Alkalis with HNO3
NB: All trioxonitrate (v) salts are soluble in water and easily decomposed by heating.
| Metal | Decomposition of the Corresponding trioxonitrate (v) |
| K
Na |
These ones decompose to the corresponding dioxonitrate (iii) and oxygen
e.g 2NaON3(s) → 2NaNO2(s) + O2(s) |
| Ca Mg AL Zn Pb H CU |
These trixoninitrate decompose on heating to form the corresponding metallic oxides, oxygen and reddish-brown Nitrogen (iv) oxide
e.g |
| Hg Ag Au |
These ones decompose on heating to the corresponding metal, oxygen and reddish-brown Nitrogen (iv) oxide. |