The pH of a solution is 5.00.Which of the following is TRUE about the solution?

Question

Quizplus · Accepted Answer

The pH of a solution is the negative logarithm of the hydrogen ion concentration ([H+]). Using the formula pH = -log[H+], we can rearrange it as [H+] = 10^-pH. Plugging in the given pH of 5.00 into the equation, we get [H+] = 10^-5.00 = 1.0 × 10^-5 M. Since the solution is acidic, it has a higher concentration of hydronium ions (H3O+) than hydroxide ions (OH-). Therefore, we can assume that the concentration of H3O+ is equal to the [HSB] concentration. The [HSB] concentration can be expressed as [HSB] = [H3O+][SB]/[SBOH], where [SB] is the concentration of the acid and [SBOH] is the concentration of the conjugate base. At pH 5.00, the [HSB] concentration can be calculated as [HSB] = (1.0 × 10^-5 M)(1)/(1.0 × 10^0 M) = 1.0 × 10^-5 M. So the correct answer is B.

The PH of a Solution Is 5