The pH of a certain solution is 3.0. How many H⁺(aq)ions are there in 1.0 L of the solution? A)0.001 ions B)1,000 ions C)6.* 10²⁰ ions D)3 ions E)6.* 10²⁶ ions

Question

Quizplus · Accepted Answer

The given pH of 3.0 indicates that the solution is acidic with a hydrogen ion concentration of 10^-3 M. The reaction given (H⁺) suggests the presence of two ions, H+ and HSO4-. At a pH of 3.0, most of the HSO4- will have already donated one proton to form H+ ions, leaving a concentration of HSO4- ions at around 10^-4 M. Therefore, the total number of ions present in 1L of the solution can be calculated as follows: [H+] = 10^-3 M [HSO4-] = 10^-4 M Total ions = (10^-3 + 10^-4) x 6.022 x 10^23 = 6.06 x 10^20 = 6.F1F1F1S1F1F1F10 10²⁰ ions Therefore, the best answer is Choice C.

The PH of a Certain Solution Is 3