Why are Hydrochloric Acid, Sulphuric Acid, and Nitric Acid are considered as Strong Acid?

An acid is a molecule or substance that has a pH value of less than 7.0 when it is present in an aqueous solution. An aqueous solution is any solution where water is a solvent. There are only 7 strong acids. The strong acids are hydrochloric acid, nitric acid, sulfuric acid, hydrobromic acid, hydroiodic acid, perchloric acid, and chloric acid. All the other acids are weak.

Hydrochloric acid, sulphuric acid, and nitric acid are considered strong acid because they dissociate completely into their ions when they come in contact with water, yielding one or more protons per molecule.

HCl (Hydrochloric acid)  → H⁺ + Cl^- 

H₂SO₄  (Sulphuric acid) → 2H⁺ + SO4^2- 

HNO₃  (Nitric acid)→ H⁺ + NO^3-

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Updated on: 10-Oct-2022

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