Question

"All acid solutions contain hydronium (H3O+) ions".

Why?

My opinion: In every acid, water is present. H2O + H+ forms H3O+. Am I right?

Answer 1

check the definition of acid and base
there are few definitions according to how they react

Answer 2

generally, we can define with \(Bronsted\), an acid, like a substance, which when diluted inside water, it releases protons \(H^+\). So, for example, if we add some of \(H_2SO_4\), which is a strong acid, to a quantity of water, the released protons will bound to molecules of water:
\[{{\text{H}}^ + } + {{\text{H}}_{\text{2}}}{\text{O}} \to {{\text{H}}_{\text{3}}}{{\text{O}}^ + }\]