I want to know the machanism
NaNO2 reacts in acidic conditions with HCl in a following way to form nitrosonium ion:
NaNO2 + HCl -----> HNO2 + NaCl.
2HNO2 --------> N2O3 + H2O
NO+ + NO2-
NO+ -like is formed, under action of HOAc, too.
Sulfuric acid has changed color to yellow.
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