Question

A solution has a pH of 11.60. The value of [H+] is

a. 2.5 10-4

b. 4.0 10-3

c. 4.0 10-11

d. 2.5 10-12

Answer 1

Using the formula pH = -log [H+], the concentration of hydrogen ions ([H+]) for a pH of 11.60 is calculated to be 2.5 × 10^-12 M.

Step-by-step explanation:

To calculate the concentration of hydrogen ions ([H+]) from the given pH of 11.60, we use the formula:

pH = -log [H+]

First, we need to isolate [H+] by taking the inverse logarithm (antilog) of the negative pH value:

[H+] = 10-pH = 10-11.60

Using a scientific calculator to find the antilog:

[H+] = 2.5 × 10-12 M

Therefore, the correct answer for the concentration of hydrogen ions in a solution with a pH of 11.60 is 2.5 × 10-12 M, which corresponds to option d.