The concentration of hydronium ions in an acid decrease when it is diluted.
Adding more water to the solution is called dilution.
Acids dissociate to form hydrogen or hydronium ions in water.
For example, dissociation of hydrochloric acid in water:
HCl(aq) + H₂O(l) → H₃O⁺(aq) + Cl⁻(aq).
Hydrochloric acid (HCl) is strong acid, which means that concencentration of hydronium ions are equal as concentration of hydrochloric acid.
For example:
V1(HCl) = 1 L; initial volume of acid
c1(HCl) = 1 M; initial concentration
n1(HCl) = 1 mol; amount of pure acid
If we dilute solution to 10 liters:
V2(HCl) = 10 L
n2(HCl) = 1 mol; amount of pure acid does not change, because water is added
c2(HCl) = 1 mol / 10 L = 0.1 M, concentration decrease
More about diluted solution: brainly.com/question/24881505
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