Potassium nitrite reacts with hydrogen chloride to produce potassium chloride, potassium nitrate, nitric oxide as well as water.

Hydrogen Chloride - Concentrated Solution: The reaction proceeds in a boiling solution.

Potassium nitrite reacts with hydrogen chloride to produce potassium chloride as well as nitrous acid.

Hydrogen Chloride - Diluted Solution: The reaction takes place at room temperature.

The possible chemical reactions when Potassium nitrite reacts with hydrogen chloride are:

KNO2 + HCl = H2O + KCl + NO + NO2

KNO2 + HCl = H2O + KCl + KNO3 + NO

KNO2 + HCl = H2 + KCl + NO2

KNO2 + HCl = H2O + KCl + NCl3

KNO2 + HCl = H2O + KCl + N2O3