What is the Ka of nitrous acid?

Ka	Acid
1.0 * 10-2	Hydrogen sulfate ion	HSO4 –
7.1 * 10-3	Phosphoric acid	H3PO4
7.2 * 10-4	Nitrous acid	HNO2
6.6 * 10-4	Hydrofluoric acid	HF

How acidic is nitrous acid?

Nitrous acid

Names
Appearance	Pale blue solution
Density	Approx. 1 g/ml
Melting point	Only known in solution or as gas
Acidity (pKa)	3.15

What is the basicity of nitrous acid?

Monobasic: Since Nitrous acid HNO2 has only one hydrogen ion which it can donate to a base in case of a reaction between an acid and a base, it is known as a monobasic acid. It can release only one proton, i.e., H+ in solution.

What is the formula for nitrous acid?

HNO2
Nitrous acid/Formula

What is formula of nitrous acid?

Why is nitrous acid a weak acid?

Every acid reacts with water. When it loses a proton, it transfers that proton to water. Let’s look at the reaction of a strong acid, nitric acid or HNO3, and a weaker acid, nitrous acid or HNO2, in water. Nitric acid is a stronger acid than nitrous acid because its conjugate base is more stable.

What is pKa and pH?

The pH is a measure of the concentration of hydrogen ions in an aqueous solution. Essentially, pKa tells you what the pH needs to be in order for a chemical species to donate or accept a proton. The relationship between pH and pKa is described by the Henderson-Hasselbalch equation.

What are the properties of nitrous acid?

Physical Properties of Nitrous Acid – HNO2

Odour	Unpleasantly bitter or pungent
Appearance	Pale blue solution
Specific Density	1.35 g/cm3
Systematic name‎	‎Dioxonitric(III) acid