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Some [[acid]]s are so strong that all of the [[Hydrogen Ion (Chemistry)|Hydrogen ions]] become dissociated from the rest of the [[compound]].
: HCl(aq) → H<sup>+</sup>(aq)+Cl<sup>-</sup>(aq)
In many [[acid]]s not all of the [[molecule]]s will lose their [[Hydrogen Ion (Chemistry)|Hydrogen ions]] and this process can be reversed leaving them in a state of [[Chemical Dynamic Equilibrium|equilibrium]]:
: H<sub>2</sub>SO<sub>4</sub>(aq) ⇌ H<sup>+</sup>(aq)+HSO<sub>4</sub><sup>-</sup>(aq)
: HNO<sub>3</sub>(aq) ⇌ H<sup>+</sup>(aq)+NO<sub>3</sub><sup>-</sup>(aq)