Solution X is prepared by dissolving in water

CHEMISTRY · Single correct · A Level · Chemistry · Acids and bases · Acids and bases

Problem

Solution X is prepared by dissolving

\text{HCl}

in water, and Solution Y is prepared by dissolving

\text{H}_2\text{SO}_4

in water. The two solutions are found to have identical pH values at 25\,

^{\circ}

C. Which statement correctly compares the molar concentrations of the original acids? (a)

[\text{HCl}] = [\text{H}_2\text{SO}_4]

(b)

[\text{HCl}] = 2[\text{H}_2\text{SO}_4]

(c)

[\text{HCl}] = \tfrac{1}{2}[\text{H}_2\text{SO}_4]

(d)

[\text{HCl}]

and

[\text{H}_2\text{SO}_4]

cannot be compared without additional information