In water the acids $\mathrm{HClO}_{4}, \mathrm{HCl}, \mathrm{H}_{2} \mathrm{SO}_{4}$ and $\mathrm{HNO}_{3}$
exhibit the same strength as they are completely ionized in water (a base). This is called .......... of the solvent water.
(1) Strength
(2) Capacity
(3) Buffer effect
(4) Lcvelling cffect