In this question, we have to determine the [H+] of an acidic solution that has a pOH of 8.27.
In order to find this value, we need to find the value of pH before, and we have a mathematical relationship between pH and pOH:
pH + pOH = 14, this value refers to the maximum value of pH scale
pH + 8.27 = 14
pH = 14 - 8.27
pH = 5.73
Now that we have the pH value, 5.73, we can find the [H+] value with the following formula:
[H+] = 10^-pH
[H+] = 10^-5.73
[H+] = 1.86*10^-6, this is the value of H+