Question

Hydrochloric acid is a strong acid. Acetic acid is a weak acid. Which statement about hydrochloric acid and acetic acid is correct?(1 point)
The pH of a solution of hydrochloric acid must be less than the pH of a solution of acetic acid.
A solution of hydrochloric acid at equilibrium will have a greater concentration of solute than a solution of acetic acid at equilibrium.
The dissociation constant for hydrochloric acid is greater than the dissociation constant for acetic acid.
If the initial concentration of each acid is the same, then acetic acid will produce more H3O+ ions than hydrochloric acid.

Answer 1

The correct statement about hydrochloric acid and acetic acid is : ( A )

The pH of a solution of hydrochloric acid must be less than the pH of a solution of acetic acid.

Given that pH is the inverse of concentration of H₃O⁺ ions , The stronger acid ( Hydrochloric acid ) dissociates in solution producing a maximum amount of  H₃O⁺ ion, while the weak acid ( acetic ) will disassociate partially in a solution producing a lesser amount of  H₃O⁺ ion.

Therefore the pH of a solution of hydrochloric acid must be less than the pH of a solution of acetic acid.

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